Journal of Pathology and Translational Medicine

Case Studies

Abrupt Dyskeratotic and Squamoid Cells in Poorly Differentiated Carcinoma: Case Study of Two Thoracic NUT Midline Carcinomas with Cytohistologic Correlation: Taebum Lee, Sangjoon Choi, Joungho Han, Yoon-La Choi, Kyungjong Lee; J Pathol Transl Med. 2018;52(5):349-353. Published online July 27, 2018; DOI: https://doi.org/10.4132/jptm.2018.07.16

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Cytologic diagnosis of nuclear protein in testis (NUT) midline carcinoma (NMC) is important due to its aggressive behavior and miserable prognosis. Early diagnosis of NMC can facilitate proper management, and here we report two rare cases of thoracic NMC with cytohistologic correlation. In aspiration cytology, the tumor presented with mixed cohesive clusters and dispersed single cells, diffuse background necrosis and many neutrophils. Most of the tumor cells had scanty cytoplasm and medium-sized irregular nuclei, which had fine to granular nuclear chromatin. Interestingly, a few dyskeratotic cells or squamoid cell clusters were present in each case. Biopsy specimen histology revealed more frequent squamous differentiation, and additional immunohistochemistry tests showed nuclear expression of NUT. Because this tumor has a notorious progression and has been previously underestimated in terms of its prevalence, awareness of characteristic findings and proper ancillary tests should be considered in all suspicious cases.

Citations

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Diagnostic significance and cytological features of NUT carcinoma by EBUS‐FNA, a case report and literature review
Yaping Ju, Miriam Velazquez, Andy Sherrod, Tiannan Wang
Cytopathology.2024; 35(4): 497. CrossRef
Exploring cytologic features and potential diagnostic challenges of metastatic NUT carcinoma to the parotid gland: A case report and a comprehensive literature review
Crystal Y. Li, Salih Salihoglu, Francisco J. Civantos, Jaylou M. Velez Torres
Diagnostic Cytopathology.2024;[Epub] CrossRef
Nuclear Protein in Testis (NUT) Carcinoma: A Comprehensive Immunohistochemical Analysis of 57 Cases With Consideration of Interpretation and Pitfall Recognition
Ayesha Farooq, Allison L. Kerper, Jennifer M. Boland, Ying-Chun Lo
Archives of Pathology & Laboratory Medicine.2024; 148(8): 898. CrossRef
BRD3‐NUTM1‐expressing NUT carcinoma of lung on endobronchial ultrasound‐guided transbronchial needle aspiration cytology, a diagnostic pitfall
Sameer Chhetri Aryal, Shereen Zia, Shannon Rodgers, Yulei Shen, Kyle Perry, Lisi Yuan
Diagnostic Cytopathology.2022;[Epub] CrossRef
Nuclear protein of the testis midline carcinoma of the thorax
Ayae Saiki, Keita Sakamoto, Yuan Bee, Takehiro Izumo
Japanese Journal of Clinical Oncology.2022; 52(6): 531. CrossRef
Approach to Mediastinal Fine Needle Aspiration Cytology
Zaibo Li, Huihong Xu, Fang Fan
Advances in Anatomic Pathology.2022; 29(6): 337. CrossRef
Diagnosis, Treatment and Prognosis of Primary Pulmonary NUT Carcinoma: A Literature Review
Jiaqian Yuan, Zhili Xu, Yong Guo
Current Oncology.2022; 29(10): 6807. CrossRef
Case report: Immunovirotherapy as a novel add-on treatment in a patient with thoracic NUT carcinoma
Linus D. Kloker, Branko Calukovic, Katrin Benzler, Alexander Golf, Sebastian Böhm, Sven Günther, Marius Horger, Simone Haas, Susanne Berchtold, Julia Beil, Mary E. Carter, Tina Ganzenmueller, Stephan Singer, Abbas Agaimy, Robert Stöhr, Arndt Hartmann, Tho
Frontiers in Oncology.2022;[Epub] CrossRef
Cytomorphology of primary pulmonary NUT carcinoma in different cytology preparations
Rimlee Dutta, Aruna Nambirajan, Saurabh Mittal, Sinchita Roy‐Chowdhuri, Deepali Jain
Cancer Cytopathology.2021; 129(1): 53. CrossRef
Update on genetically defined lung neoplasms: NUT carcinoma and thoracic SMARCA4-deficient undifferentiated tumors
Kyriakos Chatzopoulos, Jennifer M. Boland
Virchows Archiv.2021; 478(1): 21. CrossRef
Immunotherapy and Targeting the Tumor Microenvironment: Current Place and New Insights in Primary Pulmonary NUT Carcinoma
Xiang Li, Hui Shi, Wei Zhang, Chong Bai, Miaoxia He, Na Ta, Haidong Huang, Yunye Ning, Chen Fang, Hao Qin, Yuchao Dong
Frontiers in Oncology.2021;[Epub] CrossRef
Prevalence of NUT carcinoma in head and neck: Analysis of 362 cases with literature review
Taebum Lee, Junhun Cho, Chung‐Hwan Baek, Young‐Ik Son, Han‐Sin Jeong, Man Ki Chung, Sang Duk Hong, Yong Chan Ahn, Dong Ryul Oh, Jae Myoung Noh, Keunchil Park, Myung‐Ju Ahn, Hyung‐Jin Kim, Yi Kyung Kim, Young Hyeh Ko
Head & Neck.2020; 42(5): 924. CrossRef
Lung nuclear protein in testis carcinoma in an elderly Korean woman: A case report with cytohistological analysis
Hwa Jin Cho, Hyun‐Kyung Lee
Thoracic Cancer.2020; 11(6): 1724. CrossRef
Clinicopathological characteristics of primary lung nuclear protein in testis carcinoma: A single‐institute experience of 10 cases
Yoon Ah Cho, Yoon‐La Choi, Inwoo Hwang, Kyungjong Lee, Jong Ho Cho, Joungho Han
Thoracic Cancer.2020; 11(11): 3205. CrossRef

Malignant Pleural Effusion from Metastatic Prostate Cancer: A Case Report with Unusual Cytologic Findings: Jinyoung Jeon, Tae-Jung Kim, Hong Sik Park, Kyo-Young Lee; J Pathol Transl Med. 2018;52(4):257-261. Published online June 7, 2018; DOI: https://doi.org/10.4132/jptm.2018.05.08

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Abstract PDF

We present a case of 55-year-old man who complained of dyspnea and sputum for a month. He was an ex-smoker with a history of prostate cancer and pulmonary tuberculosis. Chest radiographs revealed bilateral pleural effusions of a small to moderate amount. Pigtail catheters were inserted for drainage. The pleural fluid consisted of large clusters and tightly cohesive groups of malignant cells, which however could not be ascribed to prostate cancer with certainty. We performed immunocytochemical panel studies to determine the origin of cancer metastasis. The immunostaining results were positive for prostate-specific antigen, alpha-methylacyl-coenzyme A racemase, and Nkx 3.1, consistent with prostate cancer. Pleural effusion associated with prostate cancer is rare. To our knowledge, this is the first case report in Korea to describe cytologic features of malignant pleural effusion associated with prostate cancer.

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EBUS-TBNA pleural biopsy reveals prostate cancer metastasis: A rare case report and review of the literature
Fotios Sampsonas, Dimitrios Komninos, Vasilina Sotiropoulou, Matthaios Katsaras, Dimitra Gkanetsou, Ourania Papaioannou, Panagiota Tsiri, Vasiliki Tzelepi, Argyrios Tzouvelekis
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Cytopathological Features of Extensive Bilateral Pleural Effusions in Metastatic Prostate Cancer: Report of a Rare Case
Hehua Huang, Caroline Yap
Cureus.2024;[Epub] CrossRef
Bilateral pleural effusion: etiology, diagnostics
N. A. Stogova
PULMONOLOGIYA.2022; 32(6): 885. CrossRef
Rare Metastatic Prostate Cancer Mimicking Lymphoma with Malignant Pleural Effusion
Tung Liu, En Meng, Yu-Chun Lin, Tai-Kuang Chao, Yi-Ming Chang
Journal of Medical Sciences.2021; 42(1): 46. CrossRef

Original Article

Meningeal Solitary Fibrous Tumors with Delayed Extracranial Metastasis: Nayoung Han, Hannah Kim, Soo Kee Min, Sun-Ha Paek, Chul-Kee Park, Seung-Hong Choi, U-Ri Chae, Sung-Hye Park; J Pathol Transl Med. 2016;50(2):113-121. Published online December 14, 2015; DOI: https://doi.org/10.4132/jptm.2015.10.30

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Abstract PDF

Background
The term solitary fibrous tumor (SFT) is preferred over meningeal hemangiopericytoma (HPC), because NAB2-STAT6 gene fusion has been observed in both intracranial and extracranial HPCs. HPCs are now considered cellular variants of SFTs. Methods: This study analyzes 19 patients with STAT6-confirmed SFTs, who were followed for over 11 years in a single institution. Ten patients (10/19, 56.2%) had extracranial metastases (metastatic group), while the remainder (9/19) did not (non-metastatic group). These two groups were compared clinicopathologically. Results: In the metastatic group, the primary metastatic sites were the lungs (n = 6), bone (n = 4), and liver (n = 3). There was a mean lag time of 14.2 years between the diagnosis of the initial meningeal tumor to that of systemic metastasis. The median age at initial tumor onset was 37.1 years in the metastatic group and 52.5 in the non-metastatic group. The 10-year survival rates of the metastatic- and non-metastatic groups were 100% and 33%, respectively. The significant prognostic factors for poor outcomes on univariate analysis included advanced age (≥45 years) and large initial tumor size (≥5 cm). In contrast, the patients with higher tumor grade, high mitotic rate (≥5/10 high-power fields), high Ki-67 index (≥5%), and the presence of necrosis or CD34 positivity showed tendency of poor prognosis but these parameters were not statistically significant poor prognostic markers. Conclusions: Among patients with SFTs, younger patients (<45 years) experienced longer survival times and paradoxically had more frequent extracranial metastases after long latent periods than did older patients. Therefore, young patients with SFTs require careful surveillance and follow-up for early detection of systemic metastases.

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Case Study

Human Herpesvirus 8-Negative and Epstein-Barr Virus-Positive Effusion-Based Lymphoma in a Patient with Human Immunodeficiency Virus: Jung-Woo Choi, Younghye Kim, Ju-Han Lee, Young-Sik Kim; J Pathol Transl Med. 2015;49(5):409-412. Published online June 17, 2015; DOI: https://doi.org/10.4132/jptm.2015.06.03

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Abstract PDF

A 39-year-old man infected with human immunodeficiency virus (HIV) was admitted to our hospital because of sudden onset of chest pain. Chest radiography revealed pneumothorax of the right lung. Computed tomographic scans disclosed a 5.8-cm-sized emphysematous bulla in the right middle lobe of the lung. Histologically, the wedge-resected lung showed medium to large atypical cells within the bullous cavity of the Pneumocystis jirovecii pneumonia, without solid mass formation. These atypical cells were confirmed to be large B-cell lymphoma, Epstein-Barr virus–positive and human herpesvirus 8–negative. Therefore, this case was not diagnosed as primary effusion lymphoma, but effusion-based lymphoma arising in an emphysematous cavity of an HIV-infected patient. This type of effusion-based lymphoma has never been reported, and, although rare, it should be noted in order to clinically diagnose this lymphoma.

Citations

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Primary Effusion Lymphoma: A Timely Review on the Association with HIV, HHV8, and EBV
Chih-Yi Liu, Bo-Jung Chen, Shih-Sung Chuang
Diagnostics.2022; 12(3): 713. CrossRef
Human herpesvirus 8-negative effusion-based large B-cell lymphoma: a distinct entity with unique clinicopathologic characteristics
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American Journal of Surgical Pathology.2018; 42(12): 1607. CrossRef

Review

Current Concepts in Primary Effusion Lymphoma and Other Effusion-Based Lymphomas: Yoonjung Kim, Chan Jeong Park, Jin Roh, Jooryung Huh; Korean J Pathol. 2014;48(2):81-90. Published online April 28, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.2.81

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Abstract PDF

Primary effusion lymphoma (PEL) is a human herpes virus 8 (HHV8)-positive large B-cell neoplasm that presents as an effusion with no detectable tumor in individuals with human immunodeficiency virus infection or other immune deficiencies. PEL is an aggressive neoplasm with a poor prognosis. PEL cells show diverse morphologies, ranging from immunoblastic or plasmablastic to anaplastic. The immunophenotype of PEL is distinct, but its lineage can be misdiagnosed if not assessed thoroughly. PEL cells usually express CD45, lack B- and T-cell-associated antigens, and characteristically express lymphocyte activation antigens and plasma cell-associated antigens. Diagnosis of PEL often requires the demonstration of a B-cell genotype. HHV8 must be detected in cells to diagnose PEL. In most cases, PEL cells also harbor the Epstein-Barr virus (EBV) genome. Similar conditions associated with HHV8 but not effusion-based are called "extracavitary PELs." PELs should be differentiated from HHV8-negative, EBV-positive, body cavity-based lymphomas in patients with long-standing chronic inflammation; the latter can occur in tuberculous pleuritis, artificial pneumothorax, chronic liver disease and various other conditions. Despite their morphological similarity, these various lymphomas require different therapeutic strategies and have different prognostic implications. Correct diagnosis is essential to manage and predict the outcome of patients with PEL and related disorders.

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Case Study

Myxoid Liposarcoma with Cartilaginous Differentiation: A Case Study with Cytogenetical Analysis: Hyunchul Kim, Won Hwangbo, Sangjeong Ahn, Suhjin Kim, Insun Kim, Chul Hwan Kim; Korean J Pathol. 2013;47(3):284-288. Published online June 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.3.284

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Abstract PDF

Myxoid liposarcoma is a subtype of liposarcoma. This specific subtype can be identified based on its characteristic histological and cytogenetical features. The tumor has a fusion transcript of the CHOP and TLS genes, which is caused by t(12;16)(q13;p11). Most of the fusion transcripts that have been identified fall into three categories, specifically type I (exons 7-2), type II (exons 5-2), and type III (exons 8-2). A total of seven myxoid liposarcomas associated with the rare phenomenon of cartilaginous differentiation have been documented in the literature. Currently, only one of these cases has been cytogenetically analyzed, and the analysis indicated that it was a type II TLS-CHOP fusion transcript in both the typical myxoid liposarcoma and cartilaginous areas. This study presents a second report of myxoid liposarcoma with cartilaginous differentiation, and includes a cytogenetical analysis of both the myxoid and cartilaginous areas.

Citations

Citations to this article as recorded by

Myxoid liposarcoma with nuclear pleomorphism: a clinicopathological and molecular study
Naoki Kojima, Takashi Kubo, Taisuke Mori, Kaishi Satomi, Yuko Matsushita, Shintaro Iwata, Yasushi Yatabe, Koichi Ichimura, Akira Kawai, Hitoshi Ichikawa, Akihiko Yoshida
Virchows Archiv.2024; 484(1): 71. CrossRef
The Conundrum of Dedifferentiation in a Liposarcoma at a Peculiar Location: A Case Report and Literature Review
Ana-Maria Ciongariu, Adrian-Vasile Dumitru, Cătălin Cîrstoiu, Bogdan Crețu, Maria Sajin, Dana-Antonia Țăpoi, Aminia-Diana Ciobănoiu, Adrian Bejenariu, Andrei Marin, Mariana Costache
Medicina.2023; 59(5): 967. CrossRef
Myxoid liposarcoma with cartilaginous differentiation showing DDIT3 rearrangement
Kayo Suzuki, Taketoshi Yasuda, Kenta Watanabe, Takeshi Hori, Masahiko Kanamori, Tomoatsu Kimura
Oncology Letters.2017;[Epub] CrossRef

Original Articles

Finding and Characterizing Mammary Analogue Secretory Carcinoma of the Salivary Gland: Min Jung Jung, Joon Seon Song, Sang Yoon Kim, Soon Yuhl Nam, Jong-Lyel Roh, Seung-Ho Choi, Sung-Bae Kim, Kyung-Ja Cho; Korean J Pathol. 2013;47(1):36-43. Published online February 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.1.36

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Abstract PDF

Background

A new tumor entity of the salivary glands, mammary analogue secretory carcinoma (MASC) with ETV6-NTRK3 translocation, has recently been proposed. MASC was originally diagnosed as adenocarcinoma, not otherwise specified (ANOS), or acinic cell carcinoma (AciCC) by the current World Health Organization classification. We aimed to identify MASC cases by molecular tests, and to characterize their clinical, histological, and immunohistochemical features.

Methods

Thirty cases of MASC candidates were selected after review of 196 salivary gland tumors, and subjected to break-apart ETV6 fluorescence in situ hybridization (FISH), and immunohistochemical study for S100 protein, gross cystic disease fluid protein 15, DOG1, estrogen receptor, and progesterone receptor.

Results

Valid FISH results were obtained in 23 cases, and 13 positive cases were retrieved. MASCs were histologically varied, and the most frequent features observed in 10 cases were low-grade papillary/cystic/glandular patterns, intraluminal secretory materials, ovoid/wrinkled nuclei, and relatively abundant granular eosinophilic cytoplasms, corresponding to papillary-cystic or follicular types of AciCC. All cases showed diffuse immunopositivity for S100 protein. Three cases developed recurrences, but all patients remained alive.

Conclusions

MASC could be a molecularly well-defined salivary gland neoplasm, encompassing some portions of AciCC and ANOS, but its histological spectrum and clinical implication require further investigation.

Citations

Citations to this article as recorded by

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Diagnostic Utility of the JAZF1/JJAZ1 Gene Fusion in Endometrial Stromal Sarcomas and Their Histologic Variants.: Sang Ryung Lee, Joon Seon Song, Ga Hye Kim, Jene Choi, Hyung Kyoung Kim, Yonghee Lee, Kyu Rae Kim; Korean J Pathol. 2011;45(5):498-505.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.5.498

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Abstract PDF: BACKGROUND
The diagnosis of endometrial stromal sarcoma (ESS) is often difficult in cases showing diverse histological differentiation or in undifferentiated endometrial sarcoma (UES). Recently, JAZF1/JJAZ1 gene fusion has been described as a defining feature of low-grade ESS (LGESS). However, its prevalence is variably reported, and the diagnostic utility has rarely been examined for cases showing various histological differentiation.
METHODS
To test the diagnostic utility of JAZF1/JJAZ1 gene fusion in difficult cases, we compared the prevalence of the JAZF1/JJAZ1 fusion gene in LGESS with and without histological differentiation.
RESULTS
The JAZF1/JJAZ1 fusion transcript was detected in 18 of 21 LGESS (85.7%), including 14 classical LGESS (93%), four LGESS with diverse histological differentiation (67%), and two with UES (28.6%). Positive cases included two LGESS with sex cord-like differentiation, one with osseous differentiation, and two UES. LGESS showing smooth muscle differentiation revealed the fusion transcript only in the classic area. Direct sequencing analysis of two LGESS revealed a previously reported breakpoint at t(7;17)(p15;q21).
CONCLUSIONS
The JAZF1/JJAZ1 fusion gene was identified in a significant proportion of LGESS showing secondary histological differentiation except in cases with smooth muscle differentiation. Thus, this fusion gene may be useful to confirm the diagnosis in difficult cases of LGESS.

Case Reports

Adrenal Cortical Adenoma Developed in Adrenohepatic Fusion, a Mimicry of Hepatocellular Carcinoma: A Case Report.: Sun A Kim, Young Joo Lee, Kyoung Won Kim, Gyungyub Gong; Korean J Pathol. 2011;45(2):196-200.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.2.196

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Abstract PDF

Adrenohepatic fusion is the union of the liver and adrenal gland with close intermingling of their respective parenchymal cells. Adrenal cortical adenoma arising in adrenohepatic fusion tissue is extremely rare, although adrenohepatic fusion itself is relatively common. Here we report a case of a 59-year-old man with a mass in the right lobe of his liver. The mass showed slight hyperattenuation during arterial phase and hypoattenuation during portal phase on dynamic computed tomography with contrast enhancement. On pathology, the mass consisted of round to polygonal cells with clear microvesicular or eosinophilic cytoplasm, arranged in nests or in a trabecular pattern. The tumor cells were positive for inhibin and melan-A, but negative for Hep Par-1. In the periphery of the mass, adrenohepatic fusion was identified between the liver and adrenal gland, and was simultaneously resected with the mass. We report this rare case, and discuss its clinical implications, especially the differential diagnosis with hepatocellular carcinoma.

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An intrahepatic adrenal adenoma mimicking hepatocellular carcinoma: A case report and literature review
Cheng-Ju Yang, Cheng-Ming Peng
Formosan Journal of Surgery.2025; 58(5): 222. CrossRef
Adrenal cortical adenoma arising in an adreno-hepatic fusion: Case report and literature review of a potential diagnostic pitfall
Adam Stenman, Ivan Shabo, Jan Zedenius, C. Christofer Juhlin
Human Pathology Reports.2022; 29: 300656. CrossRef
Intrahepatic adrenocortical adenoma arising from adrenohepatic fusion mimicking hepatic malignancy
Yong Soo Cho, Jin Woong Kim, Hyun Ju Seon, Ju-Yeon Cho, Jun-Hee Park, Hyung Joong Kim, Yoo Duk Choi, Young Hoe Hur
Medicine.2019; 98(23): e15901. CrossRef
Direct and indirect imaging features of adrenohepatic fusion
Jung Jae Park, Byung Kwan Park, Chan Kyo Kim
Abdominal Radiology.2016; 41(2): 377. CrossRef

Cytologic Diagnosis of Malignant Pleural Effusion in Multiple Myeloma: Two Case Reports.: Yoo Duk Choi, Sung Sun Kim, Chang Woo Han, Ji Shin Lee, Jong Hee Nam, Sang Woo Juhng, Chan Choi; Korean J Pathol. 2009;43(4):382-385.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.4.382

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Malignant pleural effusion in multiple myeloma (MM) is extremely rare and is associated with poor prognosis. We experienced two cases of MM IgA type with malignant pleural effusion. The diagnoses were based on characteristic cytology and CD138 immunocytochemistry. The patients received several cycles of combination chemotherapy, since symptoms were more aggressive with an uncontrolled pleural effusion. We review the clinical features of these cases and literature concerning myelomatous pleural effusion.

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Myelomatous pleural effusion: A rare case in posttransplant myeloma
Sudha Madhuri Kandikanti, Poojitha Reddy Byreddy
RMC Global Journal.2025; 1: 94. CrossRef
Características de los pacientes con derrame pleural mielomatoso. Revisión sistemática
V. Riveiro, L. Ferreiro, M.E. Toubes, A. Lama, J.M. Álvarez-Dobaño, L. Valdés
Revista Clínica Española.2018; 218(2): 89. CrossRef
Characteristics of patients with myelomatous pleural effusion. A systematic review
V. Riveiro, L. Ferreiro, M.E. Toubes, A. Lama, J.M. Álvarez-Dobaño, L. Valdés
Revista Clínica Española (English Edition).2018; 218(2): 89. CrossRef
A 76-Year-Old Man With Anemia, Bone Pain, and Progressive Dyspnea
Thitiporn Suwatanapongched, Prapaporn Pornsuriyasak, Wasana Kanoksil, Thotsaporn Morasert, Warapat Virayavanich
Chest.2014; 145(4): 913. CrossRef

The Cytology of Metastatic Angiosarcoma in Pleural Fluid : A Case Report.: Na Rae Kim, Dong Hae Chung, Hyun Yee Cho; Korean J Pathol. 2009;43(3):285-259.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.3.285

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A 74-year-old woman presented with an abrupt onset of dyspnea that she had experienced for a week. She had been suffering from cutaneous nodules in the scalp for a year. Thoracentesis of the pleural fluid was performed. The Papanicolaou-stained smears, Thin prep and cell block preparations revealed clusters of oval-shaped cells concentrically layered about amorphous acellular cores, i.e., there was microacinar lumen formation as well as singly scattered atypical cells. The cells occasionally demonstrated intracytoplasmic vacuoles and hemosiderin deposits. Those cells stained for CD31 and they were negative for pancytokeratin. Punch biopsy from the scalp nodules revealed angiosarcoma. There are currently few reported cases of angiosarcoma in an exfoliative pleural effusion. Angiosarcoma has diverse, heterogeneous cytologic features. Making the cytologic diagnosis of metastatic angiosarcoma in pleural fluid is a challenge for pathologists. Knowledge of the clinical history is of great help for diagnosing this tumor when it appears in rare sites. Immunopanels with CD31, pancytokeratin and TTF-1 are helpful for making the differential diagnosis. The pathologists should look for clues suggesting the presence of vascular differentiation in the exfoliative cytologic materials when a diagnosis of angiosarcoma is suspected.

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Metastatic pleural angiosarcoma: A diagnostic pitfall might be overcome by morphologic clues and clinical correlation
Ok Ran Shin, Uiju Cho, Eundeok Chang, Kyung Jin Seo
Diagnostic Cytopathology.2015; 43(8): 669. CrossRef
Pleural fluid cytology in metastatic uterine angiosarcoma—A case report—
Shiho KURODA, Shioto SUZUKI, Akira KURITA, Mari MURAKI, Fumihiko TANIOKA
The Journal of the Japanese Society of Clinical Cytology.2014; 53(6): 498. CrossRef
Intranasal delivery of biologics to the central nervous system
Jeffrey J. Lochhead, Robert G. Thorne
Advanced Drug Delivery Reviews.2012; 64(7): 614. CrossRef
Fine Needle Aspiration Cytologic Findings of Angiosarcoma - Report of Two Cases -
Jin Xian Ji, Young Chae Chu, Lucia Kim, Suk Jin Choi, In Suh Park, Jee Young Han, Joon Mee Kim, Kyu Ho Kim, Ju Young Song
The Korean Journal of Pathology.2011; 45(2): 217. CrossRef

The Cytologic Features of Desmoplastic Small Round Cell Tumor with Intranuclear Inclusions : A Case Report .: Ho Chang Lee, Hye Suk Han, Ok Jun Lee; Korean J Pathol. 2009;43(3):279-284.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.3.279

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Abstract PDF: Desmoplastic small round cell tumor (DSRCT) is a rare neoplasm of young adults and it is characterized by polyphenotypic differentiation. We experienced a case of abdominal DSRCT that occurred in a 19-year-old female who presented with painful swelling of her right forearm. The tumor was cytokeratin-negative and it exhibited some tumor cells with intranuclear inclusions. Molecular demonstration of EWS-WT1 fusion transcripts is particularly useful to confirm the diagnosis of DSRCT without epithelial differentiation. We report here on a case of cytokeratin-negative DSRCT that showed an unusual feature of intranuclear inclusions.

Primary Synovial Sarcoma of the Kidney: A Case Report and Literature Review.: Mee Ja Park, Tae Hwa Baek, Joo Heon Kim, Dong Wook Kang, Hye Kyung Lee, Hyun Jin Son; Korean J Pathol. 2009;43(3):274-278.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.3.274

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Abstract PDF

Synovial sarcoma is a rare renal neoplasm that is not easy to diagnose unless SYT-SSX fusion transcripts are identified. We report here on a case of primary renal synovial sarcoma in a 35-year-old woman. A mass was discovered by accident in the lower part of the right kidney when ultrasonography was performed, and it was removed via radical nephrectomy. Grossly, the tumor was a homogeneously tan-brown soft mass that measured 4.5x3.2x3.0 cm, and it was encircled by a well-defined cystic space. The lesion exhibited hypercellularity of the oval or short spindle cells that were arranged in various solid sheets or intersecting fascicles. Immunohistochemically, the tumor showed diffuse positivity for vimentin, bcl-2 and CD99, and it showed focal positivity for epithelial membrane antigen. The SYT-SSX fusion transcripts were detected by reverse transcription-polymerase chain reaction (RT-PCR). Synovial sarcoma should be considered in the differential diagnosis when a spindle cell neoplasm is encountered in the kidney.

Citations

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Primary Renal Synovial Sarcoma and Clinical and Pathological Findings: a Systematic Review
Leandro Blas, Javier Roberti
Current Urology Reports.2021;[Epub] CrossRef
Primary Renal Synovial Sarcoma - A rare histology
Premkumar Krishnappa, Mohan keshavamurthy, Shakir Tabrez, Sreeharsha Harinatha, Mohan Balaiah Aswathaiya
Urology Case Reports.2020; 33: 101402. CrossRef

Desmoplastic Small Round Cell Tumor with Ovarian Involvement: A Case Report.: Sang Hwa Lee, Wan Seop Kim, Ji Hoon Kim, Hye Seung Han, So Dug Lim, Sang Yoon Kim, Tae Sook Hwang; Korean J Pathol. 2009;43(2):185-188.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.2.185

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Desmoplastic small round cell tumor (DSRCT) is a rare, aggressive neoplasm that preferentially involves the abdominal and pelvic cavities in relatively young males. We present a rare case of DSRCT arising in the ovary of a 16-year-old girl. During surgery, a 15 cm-sized huge mass was noted in the right ovary and wide spreading of the tumor was identified in the left ovary, uterine wall, and omentum and bowel wall. Histological investigation showed nests of small round cells with round nuclei and scanty eosinophilic cytoplasm accompanied with dense desmoplastic stroma. The immunohistochemistry showed that the tumor coexpressed epithelial, mesenchymal, and neuronal markers. The tumor cells ultrastructurally showed poorly developed cell junctions and occasionally showed intracytoplasmic aggregates of intermediate filaments. Molecular analysis of the tumor revealed chromosomal translocation t(11:22)(p13;q12) associated with the EWS-WT1 fusion protein. DSRCT should be included in the differential diagnosis of ovarian neoplasms in young patients.

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Desmoplastic small round cell tumor of the ovary
Ravi Hari Phulware, Maitrayee Roy, Neeta Singh, Sunesh Kumar, Sandeep R. Mathur
Indian Journal of Pathology and Microbiology.2021; 64(1): 206. CrossRef

Original Articles

Clinicopathologic Study of Chromosomal Aberrations in Gastric Lymphomas of Korean Patients.: Wook Youn Kim, Jung Ho Kim, Hyoungsuk Ko, Young A Kim, Yoon Kyung Jeon, Chul Woo Kim; Korean J Pathol. 2009;43(1):5-12.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.1.5

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BACKGROUND
The incidence and clinical correlation of MALT1 translocation and numerical aberrations in Korean gastric MALT lymphoma patients have been rarely reported. We studied the incidence and clinicopathologic relationship of these chromosomal aberrations in Korean gastric lymphomas.
METHODS
Seventy-six gastric lymphomas, which consisted of 40 low grade MALT lymphoma, 4 high grade MALT lymphoma and 32 diffuse large B-cell lymphoma (DLBCL) cases, were analyzed for the detection of t(11;18) API2-MALT1, t(14;18) IgH-MALT1 and aneuploidies of chromosomes 3 or 18 using fluorescence in situ hybridization.
RESULTS
The t(11;18) was demonstrated in 3 low grade MALT lymphomas (7.5%) and one DLBCL, which was associated with advanced stage, deeper invasion, and disease progression or relapse. The t(14;18) was demonstrated in none of these cases. Trisomy 3 and 18 were detected in 8 (11%) and 11 of 76 cases (12.5%) respectively, and found only in translocation-negative cases. Two of 4 high grade MALT lymphomas showed trisomy 18. All patients survived with successful second treatment after progression or relapse.
CONCLUSIONS
The t(11;18) API2-MALT1 was not quite frequent in Korean low grade gastric MALT lymphomas and was associated with advanced clinical situations. Overall prognosis was good for long-term follow-up regardless of progression or relapse.

Citations

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Clinicopathologic Study of Chromosomal Aberrations in Ocular Adnexal Lymphomas of Korean Patients
Hokyung Choung, Young A Kim, Namju Kim, Min Joung Lee, Sang In Khwarg
Korean Journal of Ophthalmology.2015; 29(5): 285. CrossRef

Correlation Between Neuronal Apoptosis and Expression of Inducible Nitric Oxide Synthase after Transient Focal Cerebral Ischemia.: Byoung Yuk Yi, Sung Kyoo Hwang, Ku Seong Kang, Hong Hua Quan, Young Mi Lee, Jung Wan Kim, Eun Kyoung Kwak, Ji Young Park, Yoon Kyung Sohn; Korean J Pathol. 2004;38(6):364-371.

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Abstract PDF: BACKGROUND
Neuronal death in acute-phase cerebral ischemic injury is caused by necrosis. However, neuronal injury after reperfusion can be associated with apoptosis.
METHODS
We used Sprague-Dawley rats whose brains were reperfused after middle cerebral artery occlusion for either 30 min or 2 h. We examined a relationship between apoptosis and the expression of inducible nitric oxide synthase (iNOS) in the brain tissue from 3 h to 14 days after reperfusion in both groups.
RESULTS
TUNEL and iNOS positivity were closely related in both groups. The 2-h ischemia group exhibited increases in the amount of TUNEL and iNOS-positive cells for up to 3 days after reperfusion, at which the TUNEL and iNOS-positive cells decreased. The 30-min ischemia group exhibited peak positivity 24 h after reperfusion, followed by a similar decrease. iNOS mRNA expression peaked 3 h after reperfusion in the 30-min ischemia group, at which time it decreased. In the 2-h ischemia group, iNOS mRNA increased 3 h after reperfusion, peaked 24 h after reperfusion, and then decreased.
CONCLUSION
These results indicated the occurrence of delayed apoptosis in transient cerebral ischemia. Increased expression of iNOS is closely associated with this apoptosis, and oxygen free radical-producing materials, such as nitric oxide, may play an important role in the induction of this apoptosis.

Immunocytochemical Expression of E-cadherin in Cell Blocks of Serous Effusions.: Byung Heon Kim, O Jun Kwon; J Pathol Transl Med. 2001;12(2):81-88.

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Abstract PDF: The differentiation between reactive mesothelial and carcinoma cells in serous effusion cytology can be a diagnostic challenge based on morphology alone. The expression of some cell adhesion molecules may be helpful in the differential diagnosis. This study evaluated the usefulness of E-cadherin immunocytochemistry for discrimination of carcinoma cells from reactive mesothelial cells. Alcohol fixed, paraffin embedded cell blocks taken from 42 reactive and 102 malignant serous effusions with histologically confirmed diagnoses were immunostained with monoclonal antibody to E-cadherin by LSAB method. E-cadherin expression was identified in only 2 benign reactive serous effusions(5%) whereas 91 malignant serous effusions(89%) expressed E-cadherin. The differences in immunostaining for E-cadherin between reactive and malignant serous effusions were statistically significant(p<0.001). The sensitivity and specificity of the E-cadherin immunostaining for carcinoma cells were 89% and 95%, respectively. In conclusion, E-cadherin is a useful diagnostic adjunct for differentiation between reactive mesothelial and carcinoma cells in serous effusions.

Utility of Calretinin in Distinction between Benign Reactive Mesothelial and Carcinoma Cells in Serous Effusions.: Byung Heon Kim; J Pathol Transl Med. 2001;12(2):89-96.

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Abstract PDF: The cytological distinction of carcinoma cells from reactive mesothelial cells in serous effusions may be difficult or impossible based on morphology alone, especially in specimens containing reactive mesothelial cells which form glandular or ball- or papillary-shaped conglomerates or which mimic malignant nuclear features. Calretinin is a newly reported immunocytochemical marker for mesothelial cells, which can potentially be utilized for facilitating this distinction. This study evaluated the usefulness of calretinin for the discrimination between reactive mesothelial and metastatic carcinoma cells in serous effusion. Immunocytochemical staining was undertaken on 33 benign reactive and 87 malignant serous effusion specimens with histologically confirmed diagnoses. The specimens including smears and cell blocks were stained with polyclonal antibody to calretinin by labelled streptavidin-biotin method. The positive expression of calretinin was noted in 32(97.0%) of 33 benign reactive effusions and 9(10.3%) of 87 malignant effusions. The sensitivity and specificity of the calretinin immunostaining for reactive mesothelial cells was 97.0% and 89.7%, respectively. In conclusion, calretinin is a useful marker for distinguishing between reactive mesothelial cells and carcinoma cells in serous effusions.

A Pathological Review of Pleural Effusion by Immunocytochemical Methods.: Dong Hwan Shin, Hee Jeong Ahn, Woo Ick Yang, In Joon Choi; Korean J Pathol. 1990;24(4):476-481.

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Abstract PDF: An unequivocal diagnosis of mesothelioma during life, on the basis of limited biopsy tissue or cytological specimens, is frequently difficult and requires distinction from inflammatory mesothelial hyperplasia on the one hand and secondary neoplasms, especially adenocarcinoma on the other. Although some studies have produced conflicting results, it is generally believed that immunohistochemical methods can aid in this distinction. To obtain comparable and reproducible results, 23 metastatic carcinoma of the pleura and 2 unequivocal malignant epiehtlial mesotheliomas were studied by the peroxidase-antiperoxedase method on paraffin-embedded cell blocks, and commercially available antibodies to carcinoembryonic antigen (CEA), keratin and epithelial membrane antigen (EMA) were used. Nineteen metastaic adenocarcinoma (73%) and two mesotheliomas (100%) reacted with keratin and EMA antibodies. Nineteen matastatic adenocarcinomas (73%) reacted with EMA antibodies. Nineteen metastatic adenocarcinoma (73%) reacted with CEA antibody; no mesotheliomas stained for CEA. Two cases of reactive mesothlial hyperplasia showed positive for keratin, but negative reaction for EMA and CEA. Noen of the antibodies used in this study was specific for mesothelioma, but CEA was found to be the most useful marker for differentiating between mesothelioma and metastatic carcinoma.

Case Reports

Composite Epithelioid Hemangioendothelioma in Pleural Effusion Mimicking Metastatic Adenocarcinoma: Cytologic and Immunocytochemical Findings.: Ki Seok Jang, Hong Xiu Han, Moon Hyang Park; J Pathol Transl Med. 2003;14(1):36-41.

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Abstract PDF: Epithelioid hemangioendothelioma is a rare vascular tumor of borderline malignancy which is characterized by the presence of "epithelioid" or "histiocytoid" endothelial cells. Superficial and deep tumors have been recognized in the extremities, head, neck, chest, and mediastinum of adult patients. It may also occur as a primary tumor of liver, bone, and other visceral organs. Few effusion cytologic findings of epithelioid hemangioendothelioma have been reported. We report a case of composite epithelioid hemangioendothelioma with focal epithelioid angiosarcomatous areas of the iliac bone and adjacent soft tissue in a 38-year-old female, which, during its metastatic course, was presented as a pleural effusion. The effusion was cellular with epithelioid cells presenting both singly and in clusters. The tumor cells were round to ovoid showing cytoplasmic vacuolization, variability in cell size, and prominent nucleoli. The effusion smears and cell block sections revealed strong positive staining for CD31 and vimentin, weak positive for CD34 and Factor VIII-related antigen, and negative for cytokeratin, CEA, and calretinin. The cytologic findings in this case were similar to that of metastatic adenocarcinoma or malignant mesothelioma. Therefore, immunocytochemical staining in smear and cell block is a helpful tool to differentiate malignant "epithelioid" cells in effusion.

Normoblasts and Lymphocytes Carry the Fused Bcr-Abl Gene in Chronic Myelogenous Leukemia: Two Color Fluorescence in Situ Hybridization(FISH) Analysis on the Blood Smears.: Chang Suk Kang, Eun Jung Lee, Won bae Lee, Yong goo Kim, Kyung Ja Han, Kyung Soo Lee, Sang In Shim; Korean J Pathol. 1998;32(1):58-62.

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Abstract PDF: We performed dual color fluorescence in situ hybridization (FISH) for the bcr/abl fusion in CML using the peripheral blood smears without destruction of cell morphology to determine the bcr/abl fusion. Two patients of CML, one patient in accelerated phase and one patient in chronic phase, were selected. The blood smears were fixed in absolute methanol. FISH was performed with the Mbcr/abl translocation DNA probe mixture and the slides were stained with Wright's stain after FISH. The blood smears of both cases revealed distinct signals without destruction of cellular morphology. The normoblasts and lymphocytes revealed beautiful fused bcr/abl signals as well as granulocytes in both cases. The results provide a novel finding that the normoblasts and lymphocytes in CML are also neoplastic clonal cells which has not been demonstrated with a single-cell approach before.

Original Articles

The Effect of Ischemic Preconditioning in Rat Liver: The Expression of Interleukin-1 and Nuclear Factor-B.: Kum Yoon Seup, Soo Kyoung Lee, Sun zoo Kim, Eun Kyoung Kwak, Ji Young Park, Tae In Park, Han Ik Bae, Yoon Kyung Sohn, In Soo Suh; Korean J Pathol. 2002;36(4):238-242.

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Abstract PDF: BACKGROUND
A short period of ischemia and reperfusion, called ischemic preconditioning, protects various tissues against subsequent sustained ischemic insult. Apoptosis of hepatocytes and sinusoidal endothelial cells are a critical mechanisms of injury in the ischemic liver. Because nuclear factor-B (NF-B) has a significant role in the cell survival, we hypothesized that ischemic preconditioning protects by inhibition of apoptosis through the expression of NF-B, induced by interleukin-1 (IL-1), which is known for enhancement of its transcription and activation.
METHODS
We induced ischemia and reperfusion on rat liver, and performed in situ terminal deoxyribonucleotidyl transferase-mediated dUTP nick end labelling assay and polymerase chain reaction for IL-1 mRNA and NF-B mRNA.
RESULTS
Apoptosis of hepatocytes and sinusoidal endothelial cells, assessed by in situ TUNEL assay, was significantly reduced with preconditioning. The expression of IL-1 mRNA and NF-B mRNA are seen on discrete monoclonal bands around 344 and 356 base pairs, in comparison with normal rat liver, but, there was no significant difference between the ischemia-reperfusion group and the preconditioning group.
CONCLUSIONS
We suggest that ischemic preconditioning confers dramatic protection against prolonged ischemia via inhibition of apotosis through the expression of IL-1 inducing NF-B and its activation. However, we need further study in the activity of NF-B, such as nucleotide shift assay, because the activity of NF-B is regulated by binding of the inhibitory protein, IB.

Cytologic Analysis of Malignant Effusion.: Sang Pyo Kim, Ji Yeon Bae, Kwan Kyu Park, Kun Young Kwon, Sang Sook Lee, Eun Sook Chang, Chung Sook Kim; J Pathol Transl Med. 1995;6(2):116-124.

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Abstract PDF: Eighty cases of malignant effusion were cytologically studied to elucidate the incidence of primary tumor site and cytologic characteristics of each tumor types. Eighty fluid specimens were composed of 43 ascitic, 35 pleural, and 2 pericardial effusion and primary tumor site had been confirmed by histology. The frequent primary sites were stomach (22 cases, 28%), lung (21 cases, 26%), ovary (11 cases, 14%), liver (7 cases, 9%), and breast (4 cases, 5%). The principal malignant tumors were adenocarcinoma (56 cases, 70%), squamous cell carcinoma (7 cases, 9%), liver cell carcinoma (7 cases, 9%), small cell carcinoma (4 cases, 5%), and non-Hodgkin}s lymphoma (4 cases, 5%). The distinctive cytologic findings according to primary tumor types were as follows ; the gastric adenocarcinomas were mainly characterized by isolated cells and irregular clusters sometimes with signet ring cells. Papillary serous cystadenocarcinoma of ovary showed frequently papillary clusters and occasional psammoma bodies. Breast carcinoma of ductal type showed cell balls with smooth margins. Colonic adenocarcinoma showed rather irregular clusters or palisading pattern of cylindrical cells. Metastatic squamous cell carcinoma, liver cell carcinoma, small cell carcinoma, and non-Hodgkin}s lymphoma showed also characteristic features. These findings indicate that the cytological features observed in the great majority of malignant effusion are similar to those of primary tumor types, which are very helpful to indentify the primary tumor site.

Case Reports

Effusion Cytology of Ki - 1 Positive Anaplastic Large Cell Lymphoma: A Case Report.: Mi Sook Lee, Mi Ja Lee, Yu Kyung Jeong, Sung Chul Lim, Keun Hong Kee, Ho Jong Jeon; J Pathol Transl Med. 1995;6(2):163-168.

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Abstract PDF: Ki-1 positive anaplastic large cell lymphoma is a newly described high-grade lymphoma and is defined by histopathological and immunologic criteria. We experienced a case of systemically involving Ki-1 positive anaplastic large cell lymphoma in a 44 year-old female which initially manifested as pleural effusion. Abdominopelvic CT scan showed the evidence of marked lymphadenopathy in retroperitoneal and both external and inguinal lymph nodes. On cytologic examination of pleural fluid tumor cells revealed pleomorphic large isolated cells with prominent nucleoli and abundant cytoplasms. The nuclei were large with irregular profiles including some deep invaginations. Also. occasional multilobed/multinucleated and binucleated nuclei were seen. Immunohistochemical examination was performed to differentiate from the undifferentiated adenocarcinoma. Hodgkin's disease, non-Hodgkin's lymphoma and malignant histiocytosis. The neoplastic cells were positive for leukocyte common antigen. CD3 CD30(ki-1) but negative for cytokeratin. epithelial membrane antigen. and CD15. A histologic diagnosis of Ki-1 positive anaplastic lymphoma was made by biopsies of the inguinal lymph node, polypoid lesion of the stomach and cecum.

Postpartum Choriocarcinoma Preceded by Neonatal Anemia and Intrauterine Fetal Death: A case Report.: Kyu Rae Kim, Kyu Young Lee; Korean J Pathol. 1994;28(3):328-331.

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Abstract: We report a case of postpartum choriocarcinoma from a 23-year old primiparous woman which was preceded by fetal anemia and intrauterine fetal death at 37 weeks' gestation. It has not been previously described in Korean literatures. The placenta, weighing 550 gm, contained multiple intervillous thrombi with laminated fibrin residue and pale cut curface. Histologic evidence of choriocarcinoma was not found in the placenta or in any fetal organs at autopsy, but large number of nucleated red blood cells and immature hemopoietic cells in the fetal capillaries of the placenta suggested the presence of fetal anemia. It was assumed that feto-maternal transfusion might had played a major role of fetal anemia and death.

Original Article

The Diagnostic Utility of Mesothelial Markers in Distinguishing between Reactive Mesothelial Cell and Adenocarcinoma Cells in Serous Effusions with Cytospin Preparation.: Sooim Choi, Mi Sun Kang; J Pathol Transl Med. 2006;17(2):108-115.

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Abstract PDF: Evaluation of serous effusions can include immunocytochemical stains that differentiate reactive mesothelial cell from adenocarcinoma cell. Among several positive mesothelial cell markers, we used desmin, CK5/6, WT1 and calretinin all known to have high sensitivity and specificity as selective mesothelial cell markers. We studied smears obtained with cytospin from 15 malignant and eight benign effusions. The mesothelial cells were positively stained by desmin, CK5/6, WT1 and calretinin in 60.9%, 29.1%, 26.7% and 56.5%, respectively among 8 benign and 15 malignant effusions; the adenocarcinoma cells were positively stained 6.7%, 13.3%, 1.0% and 0.0%, respectively among 15 malignant effusions. The percentage of positively stained mesothelial cells were somewhat lower for all antibodies compared to the results of previous studies. This was likely due to the differences in preparation methods and fixatives among studies. In conclusion, the use of desmin and calretinin were more valuable than CK5/6 and WT1 for distinguishing between reactive mesothelial cell and adenocarcinoma cells in serous effusion; however, choice of the proper preparation methods and fixatives are also important

Case Report

Adreno-Hepatic Fusion: A case report.: Kyung Moo Yang, Young Nyun Park, Chan Il Park; Korean J Pathol. 1998;32(5):385-387.

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Abstract: Adreno-hepatic fusion is rare condition defined as adhesion of the liver and right adrenal cortex with close intermingling of the respective parenchyme. It is suggested to be an aging phenomenon, because its incidence is much higher in older age group. Clinically it may pose a problem of operability of the organ involved. We report a case of incidentally found adreno-hepatic fusion in a 49 year old female patient with adenocarcinoma of the sigmoid colon. The segementectomy of VIII segement of the liver was done due to a 6 4 cm sized metastatic nodule of adenocarcioma. Pathological examination of the liver revealed an ovoid shaped, 1 0.5 cm sized adrenal cortical tissue. It was subcapsularly located and about 1cm apart from the metastatic adenocarcinoma with an intervening normal hepatic tissue. The adrenal tissue was mainly composed of zona fasciculata without medullary tissue. In the interphase, the adrenal tissue and liver tissue were admixed closely and partially septated by thin fibrous tissue. There was no inflammatory response to the heterotropically located adrenal tissue and there was no symptom related to the adrenal gland.

Original Articles

Diagnostic Value of p53 Expression in the Evaluation of Effusions.: Jin Shin Lee, Chang Soo Park; J Pathol Transl Med. 1996;7(2):138-143.

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Abstract PDF: The diagnostic accuracy of routine cytological preparations from effusions ranges from 60% to 70%. Immunohistochemical markers, especially tumor-associated antigens, have been successfully employed to increase diagnostic sensitivity in effusion cytology. However, more than two different antibodies in diagnosis of effusions are needed. In the view of prevalence of abnormalities of p53 gene in human malignancies, we investigated the diagnostic usefulness of demonstration of p53 protein immunoreactivity in distinguishing benign changes versus malignant processes in effusions. p53 protein expression was studied immunohistochemically in 76 effusions(28 malignant and 48 benign) using anti-human p53 antibody. p53 immunoreactivity was identified in 19 of 28(67.9%) malignant effusions. In contrast, no p53 immunoreactivity was!, observed in all benign effusions. A specificity of 100% and a sensitivity of 67.9% Were observed. These results suggest that immunohistochemical detection of p53 protein seems to be helpful in distinguishing benign changes versus malignant processes in effusions, although its principal limitation is-its relatively low sensitivity.

Diagnostic Value of Flow Cytometric DNA Analysis in the Evaluation of Effusions .: Ji Shin Lee, Sang Woo Juhng; J Pathol Transl Med. 1997;8(1):20-26.

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Abstract PDF: The specificity of cytologic examination in effusions is high but the sensitivity is low. Therefore, various ancillary methods for the detection of malignant cells in effusions have been proposed. The presence of an aneuploid cell population is generally considered diagnostic of malignancy. The purpose of this study is to determine whether the routine use of flow cytometry adds to standard cytologic evaluation in effusions. We did flow cytometric DNA analysis in 76 effusions(28 malignant and 48 benign fluids). All the 48 benign effusions were diploid. There were 12(42.9%) aneuploid and 16(67.1%) diploid malignant effusions. Based on these results flow cytometric DNA analysis had a sensitivity of 42.9% and a specificity of 100%. These results suggest that flow cytometric DNA analysis may be a useful adjunct to conventional cytology, but its principal limitation is its relatively low sensitivity.

Cytologic Features and Distribution of Primary Sites of Malignant Cells in Body Cavity Fluids .: Kang Suek Suh, Chang Hun Lee, Hyun Ok Kim; J Pathol Transl Med. 1997;8(1):35-46.

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Abstract PDF: The authors reviewed 167 malignant effusions from 110 patients, of which the primary site was established on the basis of either biopsy or surgical resection of the primary neoplasm. Main factors analysed were the distribution of primary organs and the cytohistologic correlation of body cavity effusions. The 167 fluid specimens from 110 patients consisted of 90 cases(53.9%) of pleural, 68(40.7%) of peritoneal, and 9(5.4%) of pericardial origins. Histologically they consisted of 82 cases(74.5%) of adenocarcinoma, 8(7.3%) of malignant lymphoma, 6(5.5%) of squamous cell carcinoma, and 3(2.7%) of small cell carcinoma. The most common site among the primary lesions was the stomach in 25 cases(22.7%) followed by the lung in 21 (19.1%), ovary in 17(15.5%), and breast in 7(6.4%). As for the distribution of primary tumors in adenocarcinoma, the most common site was lung in 16 cases (48.5%) in pleural fluid and stomach in 22(48.9%) in peritoneal fluid. In pericardial effusions, all 5 cases were from the lung. As a whole, the cytologic findings of malignant effusion were fairly representative of histologic characteristics of primary lesions. Thus, when the primary lesion is unknown, careful evaluation of effusion cytology is presumed to be a helpful tool for tracing the primary tumor.

Case Reports

Cytologic Findings of Rheumatoid Pleuritis in Pleural Effusion: A Case Report .: Hee Jeung Cha, Soo Kee Min, Joon Mee Kim, Young Chae Chu; J Pathol Transl Med. 1997;8(1):47-51.

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Abstract PDF: Patients with rheumatoid arthritis of any degree of severity or duration may develop necrotizing granulomatous pleuritis, a morphologic replica of the inflammatory reaction characteristic of rheumatoid synovitis and rheumatoid nodules. The principal feature is the background composed of granular, amorphous, particulate material or debris of various hues. The material is sometimes eosinophilic, sometimes more cyanophilic, or even green in the Papanicolaou stain. Within this background are elongated, fibroblast-like epithelioid cells, numerous multinucleated giant cells and degenerating leukocytes. The combination of the debris, spindle epithelioid cells, and multinucleated giant cells in fluid is pathognomonic for rheumatoid pleuritis. We experienced a hcase of rheumatoid pleuritis showing these characteristic cytologic findings. The patient was a 63 year-old man with positive rheumatoid factor. The pleual fluid specimen revealed elongated epithelioid cells and multinucleated giant cells in a background of amorphous granular material.

Secondary Hemochromatosis in a Patient with Aplastic Anemia: An autopsy case report.: Seung Mo Hong, Ghil Suk Yoon, Young Min Kim, Hojung Lee, Gyeong Hoon Kang, On Ja Kim; Korean J Pathol. 1998;32(8):608-612.

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Abstract: We report an autopsy case of secondary hemochromatosis associated with multiple frequent blood transfusion for the treatment of aplastic anemia. A 23-year-old man had been diagnosed as having aplastic anemia at the age of 13. He received a whole blood transfusion, about 1280 ml, every month during the past 10 years. Recently he developed diabetes mellitus and a congestive heart failure. The autopsy revealed that multiple organs were affected by secondary hemochromatosis, including the liver, heart, pancreas, spleen, bone marrow, stomach, thyroid gland, adrenal glands, and testes. The lungs and liver showed gross and microscopic findings consistent with a congestive heart failure in addition to hemochromatosis. The details are presented. This is a case of rare secondary hemochromatosis occurring in a young man and presenting the classic histopathologic changes indistinguishable from those of primary hemochromatosis.

Original Articles

PLC-gamma1 for Differentiating Adenocarcinoma from Reactive Mesothelial Cells in Effusions.: Woo Yeong Ju, Sung Sook Kim; J Pathol Transl Med. 1997;8(2):115-119.

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Abstract PDF: Cytologic diagnosis of reactive or malignant effusion is sometimes difficult. Espe- cially, differentiation of benign reactive mesothelial cells from malignant cells in body effusion is more difficult. Recently, immunohistochemistry has been used to diagnose difficult cases. Phospholipase C(PLC)-gamma 1 is one of the isoenzyme of the PLC which plays central role in signal transduction involving cellular growth, differentiation and transformation by phosphorylating many protein component. Increased expression of PLC-gamma 1 in human breast carcinoma, colorectal carcinoma and stomach cancers are reported. To evaluate the efficacy of positive PLC-gamma 1 immunostaining in the diagnosis of malignancy in effusions, paraffin-embedded cell blocks of pleural fluid and ascites from 10 patients(5 metastatic adenocarcinomas, and 5 reactive mesothelial cells) were immunostained with a monoclonal antibody to PLC-gamma 1. PLC-gamma 1 immuostained all the adenocarcinomas in cell block(5/5) with intense membrane pattern, however, none of the reactive mesothelial proliferations stained with the diagnostic membrane pattern. Thus, our study strongly supports the conclusion that PLC-gamma 1 immunopositivity is likely to become a useful adjunct for the diagnosis of malignancy in effusions.

Flush Perfusion, Preservation and Reperfusion Effects in Lung Transplantation: Light Microscopic and Ultrastructural Study.: Kun Young Kwon, Young Keun Lim, Jae Hoon Bae, Chang Kwon Park; Korean J Pathol. 1998;32(11):967-977.

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Abstract: This study was undertaken to investigate the morphologic changes following flushing, preservation and reperfusion procedures in a canine lung allotransplantation model. Donor lungs were flushed with modified Euro-Collins (MEC) solution, low potassium dextran glucose (LPDG) solution or University of Wisconsin (UW) solution, then stored at 10oC for 20 hours. Light microscopic and electron microscopic features of the lungs were examined after flushing, preservation and 2 hours after reperfusion. After flushing light microscopy showed focal mild alveolar collapse and interstitial edema. After preservation the lung tissue showed multiple foci of alveolar collapse, consolidation, and alveolar epithelial cell damage. After reperfusion the lung tissue showed diffuse alveolar collapse, consolidation and many destroyed cellular debris in the alveolar lumina. After flushing electron microscopy showed focal alveolar collapse and mild swelling of type I epithelial cells. After preservation both type I epithelial cells and endothelial cells were swollen and destroyed focally. Some type I epithelial cells were detached from the basal lamina. The endothelial cells showed luminal protrusion of tactile-like structure and vacuoles of the cytoplasm. After reperfusion the lung tissue showed fibrin material in the alveoli, prominent type I epithelial cell swelling with fragmented cytoplasmic debris and marked endothelial cell swelling with vacuoles or tactile-like projections. The alveolar macrophages showed active phagocytosis. After preservation scanning electron microscopic examination of the pulmonary arteries showed multiple patchy areas of swelling or conglomerated lesions in the inner surface of the pulmonary arteries. In conclusion, the ultrastructural changes associated with flushing were mild in severity, the donor lungs were injured during the preservation, and further damage occurred during the reperfusion.

Distinction between Reactive Mesothelial and Carcinoma Cells in Serous Effusions by Mucin- and Immuno-cytochemical Panel .: Byung Heon Kim; J Pathol Transl Med. 1998;9(1):1-14.

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Abstract PDF: The cytologic distinction of carcinoma cells from reactive mesothelial cells can be difficult, especially in specimens containing abundant reactive mesothelial cells and inflammatory cells with scant carcinoma cells. This study evaluates the usefulness of mucin and immunocytochemistry for discrimination between reactive mesothelial cells and carcinoma cells, and sensitivity and specificity of these stains for the detection of metastatic carcinoma in serous effusions. Immunocytochemical panel including mucin cytochemistry with the periodic acid-Schiff(PAS) reaction after or without diastase digestion was undertaken on 127 serous effusion specimens with histologically confirmed diagnoses. The specimens including cell smears and cell blocks were stained with PAS and antibodies to carcinoembryonic antigen(CEA), epithelial membrane antigen(EMA), cytokeratin(CK), and vimentin. The sensitivities of these stains for metastatic carcinoma(127 cases) were 49%(46/94) in PAS, 48%(60/124) in CEA, 89%(97/109) in EMA, 88%(93/106) in CK, and 25%(20/81) in vimentin. The sensitivities of stains for reactive mesothelial cells(36 cases) were 19%(7/36) in EMA, 78%(28/36) in CK, and 75%(27/36) in vimentin. The PAS and CEA stains were not reacted with all cases of benign reactive serous effusions containing abundant reactive mesothelial cells. The specificities of stains for metastatic carcinoma(127 cases) were 100% in PAS, 100% in CEA, 81% in EMA, 22% in CK, and 25% in vimentin. The optimal combination of stains for use in a panel was PAS and CEA. Combined results from these two stains yielded an advanced sensitivity of 8% in PAS and 4% in CEA for metastatic carcinoma. EMA wasalso cosiderably useful for identification of carcinoma cells. CK and vimentin were not suitable for distinguishing between reactive mesothelial cells and carcinoma cells.

Distribution of Free Radicals in Reperfusion Injury after Transient Brain Ischemia.: Eunkyoung Kwak, Hyungho Suh, Jiyoung Park, Yunsup Kum, Taein Park, Jungwan Kim, Yoonkyung Sohn; Korean J Pathol. 2000;34(11):893-900.

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Abstract PDF: Free radicals are known as an important factor which may act on reperfusion injury after transient or permanent brain ischemia. Numerous studies about cytotoxic function of free radical have been done. Most of these studies demonstrate the function of free radical in reperfusion injury by using radical scavenger or antioxidant as inhibitor of radicals. We used a modification of Karnovsky's Mn2 /diaminobenzidine (DAB) technique to demonstrate intravascular free radicals following transient occlusion and reperfusion of one middle cerebral artery in Sprague-Dawley rats. The MCA was occluded for 2 hours using an intraluminal suture method. The reperfusion time after transient ischemia was 1 hour, 6 hours, and 24 hours, respectively. Animals were perfused transcardially with solution containing Mn2 and DAB. After DAB perfusion, the brains were removed promptly, sectioned in frozen, and stained with methylene blue for light microscopic examination. Upon light microscopic examination, free radicals were confined within intravascular lumen and the amount of deposits increased according to the duration of reperfusion. Upon electron microscopic examination, free radicals were located in nuclear membrane and membrane of mitochondria and RER, and demonstrated as electron dense deposits. In addition, cell processes of the neuron revealed an electron dense deposits beneath the inner side of the membrane. In conclusion, free radicals demonstrated in the reperfusion injury area indicate that free radical acts as an important cytotoxic factor. Intracellular localization of free radicals may explain the relationship between free radical and delayed neuronal injury.

Case Report

Adreno-Hepatic Fusion.: So Yeong Oh, Woo Sung Moon, Ho Yeul Choi; Korean J Pathol. 1998;32(12):1095-1097.

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Abstract: We report a rare case of adreno-hepatic fusion in a 63-year-old man with a traumatic hepatic rupture. The adrenal tissue was located beneath the Glisson's capsule of the liver, and measured 3.5x2x0.3 cm. On histologic examination, the ectopic tissue was composed of both adrenal cortex and medulla surrounded by a delicate capsule of connective tissue.

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