Journal of Pathology and Translational Medicine

Original Articles

Prognostic significance of viable tumor size measurement in hepatocellular carcinomas after preoperative locoregional treatment: Yoon Jung Hwang, Youngeun Lee, Hyunjin Park, Yangkyu Lee, Kyoungbun Lee, Haeryoung Kim; J Pathol Transl Med. 2021;55(5):338-348. Published online September 2, 2021; DOI: https://doi.org/10.4132/jptm.2021.07.26

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Background
Preoperative locoregional treatment (LRT) for hepatocellular carcinoma (HCC) often induces intratumoral necrosis without affecting the overall tumor size, and residual viable tumor size (VTS) on imaging is an important clinical parameter for assessing post-treatment response. However, for surgical specimens, it is unclear whether the VTS would be more relevant to prognosis compared to total tumor size (TTS).
Methods
A total of 142 surgically resected solitary HCC cases were retrospectively reviewed. The TTS and VTS were assessed by applying the modified Response Evaluation Criteria in Solid Tumors method to the resected specimens, and correlated with the clinicopathological features and survival.
Results
As applying VTS, 13/142 cases (9.2%) were down-staged to ypT1a. Although the survival analysis results for overall survival according to TTS or VTS were similar, VTS was superior to predict disease-free survival (DFS; p = .023) compared to TTS (p = .08). In addition, multivariate analysis demonstrated VTS > 2 cm to be an independent predictive factor for decreased DFS (p = .001). In the subpopulation of patients with LRT (n = 54), DFS in HCCs with TTS or VTS > 2 cm were significantly shorter than those with TTS or VTS ≤ 2 cm (p = .047 and p = .001, respectively). Interestingly, HCCs with TTS > 2 cm but down-staged to VTS ≤ 2 cm after preoperative LRT had similar survival to those with TTS ≤ 2 cm.
Conclusions
Although the prognostic impact of tumor size was similar regardless of whether TTS or VTS was applied, reporting VTS may help to increase the number of candidates for surgery in HCC patients with preoperative LRT.

Citations

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Construction and validation of a novel signature based on epithelial-mesenchymal transition–related genes to predict prognosis and immunotherapy response in hepatocellular carcinoma by comprehensive analysis of the tumor microenvironment
Biao Gao, Yafei Wang, Shichun Lu
Functional & Integrative Genomics.2023;[Epub] CrossRef
Cellular senescence affects energy metabolism, immune infiltration and immunotherapeutic response in hepatocellular carcinoma
Biao Gao, Yafei Wang, Shichun Lu
Scientific Reports.2023;[Epub] CrossRef

Guanabenz Acetate Induces Endoplasmic Reticulum Stress–Related Cell Death in Hepatocellular Carcinoma Cells: Hyo Jeong Kang, Hyang Sook Seol, Sang Eun Lee, Young-Ah Suh, Jihun Kim, Se Jin Jang, Eunsil Yu; J Pathol Transl Med. 2019;53(2):94-103. Published online January 16, 2019; DOI: https://doi.org/10.4132/jptm.2019.01.14

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Abstract PDF Supplementary Material

Background
Development of chemotherapeutics for the treatment of advanced hepatocellular carcinoma (HCC) has been lagging. Screening of candidate therapeutic agents by using patient-derived preclinical models may facilitate drug discovery for HCC patients.
Methods
Four primary cultured HCC cells from surgically resected tumor tissues and six HCC cell lines were used for high-throughput screening of 252 drugs from the Prestwick Chemical Library. The efficacy and mechanisms of action of the candidate anti-cancer drug were analyzed via cell viability, cell cycle assays, and western blotting.
Results
Guanabenz acetate, which has been used as an antihypertensive drug, was screened as a candidate anti-cancer agent for HCC through a drug sensitivity assay by using the primary cultured HCC cells and HCC cell lines. Guanabenz acetate reduced HCC cell viability through apoptosis and autophagy. This occurred via inhibition of growth arrest and DNA damage-inducible protein 34, increased phosphorylation of eukaryotic initiation factor 2α, increased activating transcription factor 4, and cell cycle arrest.
Conclusions
Guanabenz acetate induces endoplasmic reticulum stress–related cell death in HCC and may be repositioned as an anti-cancer therapeutic agent for HCC patients.

Citations

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Current trends and future prospects of drug repositioning in gastrointestinal oncology
Nayeralsadat Fatemi, Mina Karimpour, Hoda Bahrami, Mohammad Reza Zali, Vahid Chaleshi, Andrea Riccio, Ehsan Nazemalhosseini-Mojarad, Mehdi Totonchi
Frontiers in Pharmacology.2024;[Epub] CrossRef
The integrated stress response in cancer progression: a force for plasticity and resistance
Caleb L. Lines, Morgan J. McGrath, Tanis Dorwart, Crystal S. Conn
Frontiers in Oncology.2023;[Epub] CrossRef
Endoplasmic reticulum stress: Multiple regulatory roles in hepatocellular carcinoma
Jiacheng Wu, Shan Qiao, Yien Xiang, Menying Cui, Xiaoxiao Yao, Ruixin Lin, Xuewen Zhang
Biomedicine & Pharmacotherapy.2021; 142: 112005. CrossRef
The two faces of the Integrated Stress Response in cancer progression and therapeutic strategies
Eugenia Licari, Luis Sánchez-del-Campo, Paola Falletta
The International Journal of Biochemistry & Cell Biology.2021; 139: 106059. CrossRef
Repurposing of Guanabenz acetate by encapsulation into long-circulating nanopolymersomes for treatment of triple-negative breast cancer
Yusuf A. Haggag, Mohamed Yasser, Murtaza M. Tambuwala, Suleiman S. El Tokhy, Mohammad Isreb, Ahmed A. Donia
International Journal of Pharmaceutics.2021; 600: 120532. CrossRef
Endoplasmic reticulum stress: New insights into the pathogenesis and treatment of retinal degenerative diseases
Marina S. Gorbatyuk, Christopher R. Starr, Oleg S. Gorbatyuk
Progress in Retinal and Eye Research.2020; 79: 100860. CrossRef
Delineating the role of eIF2α in retinal degeneration
Christopher R. Starr, Marina S. Gorbatyuk
Cell Death & Disease.2019;[Epub] CrossRef
Repositioning of Guanabenz in Conjugation with Gold and Silver Nanoparticles against Pathogenic Amoebae Acanthamoeba castellanii and Naegleria fowleri
Areeba Anwar, Mohammad Ridwane Mungroo, Ayaz Anwar, William J. Sullivan, Naveed Ahmed Khan, Ruqaiyyah Siddiqui
ACS Infectious Diseases.2019; 5(12): 2039. CrossRef

Prognosis of Hepatocellular Carcinoma after Liver Transplantation: Comparative Analysis with Partial Hepatectomy: Kyuho Lee, Kyoung-Bun Lee, Nam-Joon Yi, Kyung-Suk Suh, Ja-June Jang; J Pathol Transl Med. 2017;51(1):79-86. Published online December 25, 2016; DOI: https://doi.org/10.4132/jptm.2016.10.13

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Abstract PDF

Background
Liver transplantation (LT) is the treatment of choice for hepatocellular carcinoma (HCC). The aim of this study was to investigate the recurrence rate of HCC after LT and prognostic factors for recurrence by comparing LT with non-transplanted resection. Methods: The participants were 338 patients who underwent LT between 1996 and 2012 at Seoul National University Hospital (LT group) and 520 HCC patients who underwent partial hepatectomy between 1995 and 2006 (control group, non-LT group). Results: In the LT group, 68 of 338 patients (19.8%) showed relapse, and the recurrence rate was lower than that in the non-LT group (64.9%, 357/520, p < .001). Stratification analysis by American Joint Committee on Cancer (AJCC) stage showed that the stage I-II LT group had a lower recurrence rate than the non-LT group. Univariate comparative analysis demonstrated that multiplicity of tumor, tumor size, gross type, Edmondson- Steiner (ES) nuclear grade, extent of tumor, angioinvasion, AJCC stage, Milan criteria, University of California at San Francisco criteria on explant pathology (all p < .001), positive expression of cytokeratin 19 (p = .002), and preoperative α-fetoprotein (AFP) (p < .001) were predictors of tumor recurrence. In multivariate analysis, LT, preoperative AFP, multiplicity of tumor, extent of tumor, size of tumor, and ES nuclear grade were independent prognostic factors. Conclusions: LT might have a protective effect against the late recurrence of stage I-II HCC compared to non-LT, and the prognostic factors for recurrence were similar to previously well-known prognostic factors for HCC.

Citations

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Related Factors of Hepatocellular Carcinoma Recurrence Associated With Hyperglycemia After Liver Transplantation
Yujian Zheng, Qing Cai, Lishan Peng, Shibo Sun, Shaoping Wang, Jie Zhou
Transplantation Proceedings.2021; 53(1): 177. CrossRef
Oncological Outcomes of Hepatic Resection vs Transplantation for Localized Hepatocellular Carcinoma
A.T. Akcam, A.G. Saritas, A. Ulku, A. Rencuzogullari
Transplantation Proceedings.2019; 51(4): 1147. CrossRef
Clustering Asian Countries According to the Trend of liver cancer Mortality Rates: an Application of Growth Mixture Models
Maryam Salari, Anoshirvan Kazemnejad, Farid Zayeri
Iranian Red Crescent Medical Journal.2017;[Epub] CrossRef

Brief Case Reports

Periductal Stromal Tumor of Breast: A Case Report and A Review of Literature: Salma L. Abbasi, Kate McNamara, Mohammed S. Absar, Alison Darlington, Francene Clucas, Sami Titi; Korean J Pathol. 2014;48(6):442-444. Published online December 31, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.6.442

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Citations

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Survey of recurrent diagnostic challenges in breast phyllodes tumours
Benjamin Yongcheng Tan, Stephen B Fox, Sunil R Lakhani, Puay Hoon Tan
Histopathology.2023; 82(1): 95. CrossRef
Management of a periductal stromal tumor in a young woman: Our breast unit experience
Irene Valente, Adela Ristani, Cristina Mancini, Eugenia Martella, Leonardo Quartieri, Cecilia D'Aloia
The Breast Journal.2020; 26(7): 1375. CrossRef
A Diagnostic Approach to Fibroepithelial Breast Lesions
Benjamin Yongcheng Tan, Puay Hoon Tan
Surgical Pathology Clinics.2018; 11(1): 17. CrossRef
A case of local recurrence of periductal stromal sarcoma of the breast
Kana TERAMOTO, Yasuro DOI, Kayo YAMAMOTO, Kaname MATSUKAWA, Hisaka IWAIHARA, Rumi MOTOSHIMA, Noboru TAKATA, Ichiro YOSHINAKA, Kazunori HARADA
Choonpa Igaku.2018; 45(1): 61. CrossRef

Solid Form of Epithelioid Hemangioma: A Case Report: Jin Roh, Min Jeong Song, Mi Woo Lee, Chan-Sik Park; Korean J Pathol. 2014;48(5):394-397. Published online October 27, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.5.394

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Citations

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Epithelioid Haemangioma of Bone: A Case Series and Comprehensive Literature Review Reappraising the Diagnostic Classification of All Epithelioid Vascular Neoplasms of Bone
Subramaniam Ramkumar
Cureus.2021;[Epub] CrossRef
Update on cutaneous epithelioid vascular tumours
Boštjan Luzar, Eduardo Calonje
Diagnostic Histopathology.2018; 24(8): 273. CrossRef
Epithelioid Hemangioma (Angiolymphoid Hyperplasia With Eosinophilia) of the Heart With Peripheral Eosinophilia and Nephrotic Syndrome
Isidro Machado, Agustín Chong, Anisia Serrano, Alfredo Mario Naranjo Ugalde, Damian Pineda, Laynes Savón, Ever Olivera, Antonio Llombart-Bosch
International Journal of Surgical Pathology.2016; 24(1): 59. CrossRef

Original Articles

Histologic Disorderliness in the Arrangement of Tumor Cells as an Objective Measure of Tumor Differentiation: Sungwook Suh, Gyeongsin Park, Young Sub Lee, Yosep Chong, Youn Soo Lee, Yeong Jin Choi; Korean J Pathol. 2014;48(5):339-345. Published online October 27, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.5.339

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Abstract PDF: Background: Inter-observer and intra-observer variation in histologic tumor grading are well documented. To determine whether histologic disorderliness in the arrangement of tumor cells may serve as an objective criterion for grading, we tested the hypothesis the degree of disorderliness is related to the degree of tumor differentiation on which tumor grading is primarily based. Methods: Borrowing from the statistical thermodynamic definition of entropy, we defined a novel mathematical formula to compute the relative degree of histologic disorderliness of tumor cells. We then analyzed a total of 51 photomicrographs of normal colorectal mucosa and colorectal adenocarcinoma with varying degrees of differentiation using our formula. Results: A one-way analysis of variance followed by post hoc pairwise comparisons using Bonferroni correction indicated that the mean disorderliness score was the lowest for the normal colorectal mucosa and increased with decreasing tumor differentiation. Conclusions: Disorderliness, a pathologic feature of malignant tumors that originate from highly organized structures is useful as an objective tumor grading proxy in the field of digital pathology.

Fine Needle Aspiration Cytology of hepatocellular Carcinoma: A Study on 247 Cases.: Kwang Gil Lee, Jong Tae Lee, Soo Im Choi, Chan II Park; Korean J Cytopathol. 1990;1(1):1-17.

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Abstract PDF: Hepatocellular carcinoma(HCC) is malignant tumor frequently occurring in Koreans. There have been few reports regarding the cytologic findings of fine needle aspiration(FNA) of HCC. Most have suggested a diagnostic problem in the cytology distinguishing HCC from some benign hepatic lesion-for example, a regeneration nodule in cirrhosis and liver cell adenoma. In spite of its high frequency in Korea, no cytologic study has been reported, concerning the FNA of HCC. In an attempt to achieve cytologic criteria for the diagnosis of HCC, the authors studied retrospectively cytopathologic findings of 247 cases of HCC. These cases were confirmed either by histologic examination including lobectomy, biopsy, or cell block material, or, when tissue diagnosis was unavailable, by a high serum alpha-fetoprotein level(over 400 I. U.). All aspiration smears were stained by the Papainicolaou method. In each case, the smears were analyzed for cell patterns and various cytomorphology of the tumor cells. The smear background was assessed for the presence of tumor cell necrosis and inflammatory components and compared to that of metastatic carcinomas. The cell patterns were classified as trabecular, acinar, dispersed, and irregular. The cytologic parameters analyzed included the degree of nuclear atypia and the presence of mitoses, intranuclear cytoplasmic inclusions, nucleolar prominency, endothelial lining, multinucleated giant cells, eosinophilc, globules bile and Mallory body. Most of the FNA of HCC showed markedly cellular smears. The tumor cells were most frequently arranged in a trabecular pattern(80.3%). The irregular(12.6%), the acinar(5.5%), and the dispersed patterns(1.7%) followed in decreasing frequency. Individual hepatoma cells were larger than normal liver cells. However, they had morphologic features characteristic of the hepatic cells : the cells were round or polygonal, their cytoplasm was abundant and granular with eosinophilic or amphophilic stainability, and their nuclei were round to oval, located centrally, and tended to have prominent nucleoli. Anaplasia and pleomorphism of tumor cells were generally mild to moderate. These findings existed even in very well differentiated cases. Mitotic figures were present in about 85% of the cases. Prominent nucleoli were observed only in about half the cases. The frequency of other cytologic features was as follows : intranuclear cytoplasmic inclusion in 86.8% ; endothelial lining in 56.1% ; bile in 19.8% ; and giant cells in 60.1%. Clear cells were often present in 11.7%, Most aspiration smears of HCC displayed clean background without necrosis or inflammatory material in contrast to the dirty, necrotic background of metastatic cancers and cholangiocarcinomas. Based on the above mentioned features, it is suqqested that the cytologic critieria most important for the diagnosis of HCC include a markedly cellular smear, trabecular pattern. hepatocytoid appearance of tumor cells, endothelial lining, the presence of bile, giant cells, intranuclear cytoplasmic inclusions, and prominent nucleoli, Among these, trabecular pattern, endothelial lining, giant cells and clean smear background are points to be considered in differentiating HCC from metastatic and cholangiocellular carcinoma.

Fine Needle Aspiration Cytology of Hepatoblastoma: Report of Two Cases.: Young Nyun Park, Kwang Gil Lee, Chan II Park; Korean J Cytopathol. 1990;1(1):98-102.

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Abstract PDF: Hepatoblastoma(HB) is a rare embryonic malignant tumor of the liver. Most morphological studies on HB have limited to the histological characteristics and only 3 cases of HB have been described in the cytology literature. We present 2 cases of HB occurring in children aged 1 year and 3 years, respectively. The distinctive cytologic features of fine needle aspiration of HB were clusters of tumor cells showing acinar and trabecular pattern, smaller tumor cells with a high nuclear-cytoplasmic ratio and hyperchromatic nuclei having prominent nucleoli, and the presence of extramedullary hematopoiesis and osteoid material. These features were also found in the cell block and the biopsy specimen, and appeared very useful in the differentiation of HB from hepatocellular carcinoma.

Enhanced Protein Expression of Signal Transducer and Activator of Transcription 3 and Protein Kinase Substrate p36 in Hepatocellular Carcinoma.: Hongxiu Han, Si Hyong Jang, Chan Kum Park; Korean J Pathol. 2009;43(5):393-399.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.5.393

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Abstract PDF: BACKGROUND
Signal transducers and activators of transcription 3 (STAT3) and protein kinase substrate p36 may be involved in cell proliferation, differentiation and growth.
METHODS
Immunohistochemistry for STAT3 and p36 was performed in 46 patients with hepatocellular carcinoma (HCC).
RESULTS
STAT3 staining was present in the cytoplasm and/or nucleus, while p36 staining was present in the nucleus. STAT3 and p36 expression occurred in 78.3% (36/46) and 47.8% (22/46) of HCC patients, respectively. However, no correlation was found between STAT3 and p36 protein expression (p>0.05). Enhanced expression of STAT3 was negatively correlated with portal vein invasion (p=0.033). Expression of STAT3 in the nucleus was correlated with tumor grade (p=0.004). Enhanced expression of p36 was correlated with tumor grade (p=0.031). HCC was correlated with HBV infection (p=0.032). The patients'5-year survival was related to expression of p36 (p=0.044), but not to total STAT3 or nuclear STAT3 (p>0.05).
CONCLUSIONS
The enhanced expression of STAT3 in the nucleus and the enhanced expression of p36 are associated with the aggressive phenotype of HCC. Enhanced p36 expression may contribute to poor survival of patients with HCC.

Case Report

Gastric Adenocarcinoma with Coexistent Hepatoid Adenocarcinoma and Neuroendocrine Carcinoma: A Case Report.: Aeri Kim, Sang Woon Kim, Sun Kyo Song, Young Kyung Bae; Korean J Pathol. 2009;43(1):79-82.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.1.79

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Abstract PDF

This report represents a very rare case of a gastric adenocarcinoma that was coexistent with hepatoid adenocarcinoma and neuroendocrine carcinoma. A 77-year-old man was admitted to our hospital due to a huge ulcerofungating mass identified at the proximal body of the stomach. After a pathological diagnosis of the tumor as a poorly differentiated adenocarcinoma was made, the patient underwent a total gastrectomy with lymph node dissection. Microscopically, the tumor consisted of three morphologically distinct components-tubular adenocarcinoma, hepatoid adenocarcinoma and neuroendocrine carcinoma. The hepatoid adenocarcinoma component resembled a hepatocellular carcinoma and produced alpha-fetoprotein. The neuroendocrine carcinoma component was positive for chromogranin and synaptophysin immunostains. This is an example of the diverse morphological and immunophenotypical differentiation of gastric carcinomas.

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An Intestinal Type Gastric Neuroendocrine Tumor: A Case Report
Mohammad Abu-Jeyyab, Renata Kakish, Malak Alkatib, Leen Alshawabkeh, Rawan Bani Hamad, Mary Almadani, Ma'wia Santarisi, Mohammad Al-Jafari, Abdulqadir J. Nashwan
Case Reports in Oncology.2023; 16(1): 1113. CrossRef
Gastric adenocarcinoma is concurrent with metastatic neuroendocrine cancer treated with nivolumab and chemotherapy: A case report
Bing Yan, Meiqi Cui, Junhao You, Fang Li, Hui Liu
Molecular and Clinical Oncology.2018;[Epub] CrossRef

Original Articles

Immunohistochemical Study of the Expression of p53, Pan-ras, c-erbB-2 and PCNA in N-Nitrosomorpholine(NNM)-Induced Hepatocellular Carcinoma of Rats.: Ok Kyung Kim, Ryun Jo Shin; Korean J Pathol. 1995;29(6):727-739.

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Abstract PDF: The focus of this study was o aialyze the morphologic expression of p53, Pan-ras, c-erbB-2, and PCNA in preneoplastic and neoplastic liver lesions induced with NNM of rats. The development of hepatocellular tumors was investigated by histology and electron microscope in 65 Splague-Dawley rats administered with NNM in drinking water at low dose(5 mg/100 ml) and high dose(20 mg/100 ml). Three types of hepatocytic degeneration glycogenotic, eosinophilic and basophilic changes were followed by the appearance of hepatocellullar carcinoma. Hepatocellular carcinoma was increased in number and size according to NNM dosage and to duration of exposure. The histological classifications of hepatocelular carcinoma wer trabecular type, which was which was the most common, large eosinophilic, small cell, adenocarcinomatous and clear cell type. The expression of p53, Pan-ras, c-erbB-2 PCNA was examined by immunohistochemical stains. Eosinophilic degeneration revealed mild positivity at 18-26 weeks for expression of all oncogenic proteins studied and PCNA, whereas precancerous lesions showed variable expression from negative to moderate positivity on PCNA. Hepatocellular carcinoma lesions showed strong positivity for all stains and increased intensity during experimental period. These may indicate that chemical carcinogen produce hepatic eosinophilic degeneration and preCancerOus lesions by genetic mutation, resulting in hepatocellular carcinoma.

Relationship between Proliferative Activity and Expression of HBcAg and p53 Protein in Hepatocellular Carcinoma and Surrounding Nontumorous Liver.: So Ya Paik, Ho Guen Kim, Chan Il Park; Korean J Pathol. 1997;31(8):773-781.

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Abstract PDF: In an attempt to discover the factors contributing to the increased proliferative activity in hepatocytes and subsequent development of HCC, the proliferative activity of hepatocytes was compared with the size of regenerative nodules and HBcAg expression status in the surrounding nontumorous liver of 45 surgically resected hepatocellular carcinomas, including 34 HBV related ones. In the tumor, the difference in proliferative activity and the histological grade was analyzed in terms of p53 gene alteration. The proliferative activity was assessed by immunohistochemical methods using Ki-67 monoclonal antibody. HBcAg expression in the surrounding nontumorous liver correlated with both the inflammatory and proliferative activity of hepatocytes (p<0.05). p53 overexpression was associated with high proliferative activity and aggressive phenotype of tumor. No correlation was observed between the proliferative activity of hepatocytes and the size of regenerative nodules in cirrhosis (p>0.05). p53 overexpression was not evident in surrounding nontumorous liver including cirrhosis. In conclusion, the above results are in line with the view that hepatic carcinogenesis is a mutistep, progressive process. In the initial stage, chronic cellular injury incurred by immumologic reaction against HBcAg seems to play a pivotal role in increased cellular regeneration. However, once transformation of hepatocytes occur the major contributor to tumor growth seems to be alteration in p53 tumor suppresor gene.

Clonality of Large Regenerative Nodule Accompanied by Hepatocellular Carcinoma.: Zhe Piao, Bong Kyun Chun, Woo Jung Lee, Young Nyun Park, Ho guen Kim, Chanil Park; Korean J Pathol. 1997;31(9):884-890.

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Abstract PDF: In order to clarify the preneoplastic nature of large regenerative nodules without dysplastic change, we analysed the clonality of hepatocellular carcinomas (HCCs) and large nodules, diameter > or =0.5 cm, of cirrhotic liver by X-linked human androgen receptor (HUMARA) gene assay, using the principle of random X chromosome methylation and inactivation in female. Ten cases of HCC and 5 cases of large nodules without dysplasia from 9 female patients were selected. All the tumors, large nodules and paired normal control cells were selectively microdissected from deparaffinized hematoxylin and eosin stained slides. Genomic DNA was isolated and digested with HhaI. Polymerase chain reaction(PCR) amplication of the HUMARA locus was performed using 32P-a-dCTP containing PCR mixtures. The PCR amplified products were separated by gel electrophoresis and analysed by autoradiography. Nine HCCs from 8 patients were monoclonal and 1 case was polyclonal and the remaining 1 case was not polymorphic at the HUMARA locus. The HCC case which showed polyclonality contained many inflammatory cells. All the large nodules were polyclonal by HUMARA assay. These results suggest that all or most of the cells composing the large regenerative nodules without dysplasia are polyclonal. This assay may be informative for the differentiation between regenerative and preneoplastic nodules in cirrhotic liver and the size of nodule may be not important in hepatocarcinogenesis.

The Effects of Transforming Growth Factor beta1 on Apoptosis in Rat Hepatocellular Carcinoma.: Young Euy Park, Young Hee Choi, Won Yo Lee, Jin Ja Park, Kyung Chan Choi, Hyung Shik Shin; Korean J Pathol. 1999;33(2):71-79.

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Abstract: Based upon the concept that carcinogenesis is associated with apoptosis, specific therapies designed to enhance the susceptibility of cancer cells to undergo apoptosis could be developed. Thus, in this paper, it was designed to investigate whether, using rat animal model with chemical-induced hepatocellular carcinoma, TGF-1 in vivo could induce apoptosis in cancer. The chemical hepatocarcinogenic procedure of Solt-Farber method was used on Sprague-Dawley rats. Experimental groups were divided into group A treated with the standard Solt-Farber regimen of diethylnitrosamine (DEN) and 2-Acetaminofluorene (AAF), group B TGF-, group C TGF-1, and group D adriamycin after hepatocellular carcinoma developed. For detection of apoptotic cells, apoptotic indices were examined by the in situ end DNA labelling method. The expression of proliferating cell nuclear antigen was examined by immunohistochemical staining. Apoptosis of rat hepatocellular carcinoma cells increased significantly to 4.92+/-2.32/HPF in the group C compared with the control group (A) (2.54+/-1.13/HPF; P<0.05). Two distinctly different populations of proliferating hepatocellular carcinoma cells were identified. The cells at G1/S boundary (weak granular staining) increased to 15.75+/-6.19/HPF and 6.45+/-2.93/HPF in the groups C and D, respectively, but decreased to 2.42+/-2.06/HPF in the group B compared with the control group (A) (6.38+/-2.18/HPF; p<0.05). The cells at S phase (strong granular staining) increased to 3.37+/-2.69/HPF in the group B but decreased to 0.32+/-0.47/HPF in the group D (p<0.05). In conclusion, these results indicate that the TGF-1 may be used as an effective anticancer agent.

Cytologic Diagnosis of Metastatic Hepatocellular Carcinoma by Aspiration Cytology of Sacrum.: Jungweon Shim, Illhyang Ko; Korean J Cytopathol. 1990;1(2):179-184.

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Abstract PDF: Bone metastasis of hepatocellular carcinoma appears to be peculiar when clinical manifestation of liver disease is not apparent, and initial diagnosis of metastatic hepatocellular carcinoma by fine needle aspiration cytology is rarely obtained. We experienced a case of 45-year-old man with metastatic hepatocellular carcinoma in the sacrum, which was diagnosed by fine needle aspiration cytology. The intrahepatic mass, measuring 1.2 cm in diameter and kept unchanged in size for two years, was never proved to be hepatocellular carcinoma histopathologically. The aspirated neoplastic cells were mostly in sheets, showing abundant acidophilic cytoplasm and large, round. centrally located nuclei with single, prominent acidophilic mucleoti. In the cell block section, diagnosis of metastatic well-differentiated hepatocellular carcinoma was made without difficulty, and definite trabecular fashion with sinusoidal endothelial cell lining was found.

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