Journal of Pathology and Translational Medicine

Original Article

A Multi-institutional Study of Prevalence and Clinicopathologic Features of Non-invasive Follicular Thyroid Neoplasm with Papillary-like Nuclear Features (NIFTP) in Korea: Ja Yeong Seo, Ji Hyun Park, Ju Yeon Pyo, Yoon Jin Cha, Chan Kwon Jung, Dong Eun Song, Jeong Ja Kwak, So Yeon Park, Hee Young Na, Jang-Hee Kim, Jae Yeon Seok, Hee Sung Kim, Soon Won Hong; J Pathol Transl Med. 2019;53(6):378-385. Published online October 21, 2019; DOI: https://doi.org/10.4132/jptm.2019.09.18

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Background
In the present multi-institutional study, the prevalence and clinicopathologic characteristics of non-invasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) were evaluated among Korean patients who underwent thyroidectomy for papillary thyroid carcinoma (PTC).
Methods
Data from 18,819 patients with PTC from eight university hospitals between January 2012 and February 2018 were retrospectively evaluated. Pathology reports of all PTCs and slides of potential NIFTP cases were reviewed. The strict criterion of no papillae was applied for the diagnosis of NIFTP. Due to assumptions regarding misclassification of NIFTP as non-PTC tumors, the lower boundary of NIFTP prevalence among PTCs was estimated. Mutational analysis for BRAF and three RAS isoforms was performed in 27 randomly selected NIFTP cases.
Results
The prevalence of NIFTP was 1.3% (238/18,819) of all PTCs when the same histologic criteria were applied for NIFTP regardless of the tumor size but decreased to 0.8% (152/18,819) when tumors ≥1 cm in size were included. The mean follow-up was 37.7 months and no patient with NIFTP had evidence of lymph node metastasis, distant metastasis, or disease recurrence during the follow-up period. A difference in prevalence of NIFTP before and after NIFTP introduction was not observed. BRAF^V600E mutation was not found in NIFTP. The mutation rate for the three RAS genes was 55.6% (15/27).
Conclusions
The low prevalence and indolent clinical outcome of NIFTP in Korea was confirmed using the largest number of cases to date. The introduction of NIFTP may have a small overall impact in Korean practice.

Citations

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Analysis of a pre-2017 follicular variant papillary thyroid carcinoma cohort reclassified as noninvasive follicular thyroid neoplasm with papillary-like features (NIFTP): an 11-year retrospective single institution experience
Shaham Beg, Sana Irfan Khan, Isabella Cui, Theresa Scognamiglio, Rema Rao
Journal of the American Society of Cytopathology.2023; 12(2): 112. CrossRef
Noninvasive Follicular Thyroid Neoplasm With Papillary-Like Nuclear Features: What a Surgeon Should Know
Jabir Alharbi, Thamer Alraddadi, Haneen Sebeih, Mohammad A Alessa, Haddad H Alkaf, Ahmed Bahaj, Sherif K Abdelmonim
Cureus.2023;[Epub] CrossRef
NTRK Fusion in a Cohort of BRAF p. V600E Wild-Type Papillary Thyroid Carcinomas
Seung Eun Lee, Mi-Sook Lee, Heejin Bang, Mi Young Kim, Yoon-La Choi, Young Lyun Oh
Modern Pathology.2023; 36(8): 100180. CrossRef
A Comprehensive Study on the Diagnosis and Management of Noninvasive Follicular Thyroid Neoplasm with Papillary-Like Nuclear Features
Bayan A. Alzumaili, Lauren N. Krumeich, Reagan Collins, Timothy Kravchenko, Emad I. Ababneh, Adam S. Fisch, William C. Faquin, Vania Nosé, Maria Martinez-Lage, Gregory W. Randolph, Rajshri M. Gartland, Carrie C. Lubitz, Peter M. Sadow
Thyroid.2023; 33(5): 566. CrossRef
Clinical-Pathological and Molecular Evaluation of 451 NIFTP Patients from a Single Referral Center
Paola Vignali, Agnese Proietti, Elisabetta Macerola, Anello Marcello Poma, Liborio Torregrossa, Clara Ugolini, Alessio Basolo, Antonio Matrone, Teresa Rago, Ferruccio Santini, Rossella Elisei, Gabriele Materazzi, Fulvio Basolo
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Noninvasive follicular thyroid neoplasm with papillary-like nuclear features: its updated diagnostic criteria, preoperative cytologic diagnoses and impact on the risk of malignancy
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Clinicopathological parameters for predicting non-invasive follicular thyroid neoplasm with papillary features (NIFTP)
Eunju Jang, Kwangsoon Kim, Chan Kwon Jung, Ja Seong Bae, Jeong Soo Kim
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The Incidence of Noninvasive Follicular Thyroid Neoplasm with Papillary-Like Nuclear Features: A Meta-Analysis Assessing Worldwide Impact of the Reclassification
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Noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) is rare, benign lesion using modified stringent diagnostic criteria: Reclassification and outcome study
David Cubero Rego, Hwajeong Lee, Anne Boguniewicz, Timothy A. Jennings
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Noninvasive Follicular Thyroid Neoplasm with Papillary-Like Nuclear Features: From Echography to Genetic Profile
Francesca Maletta, Enrico Costantino Falco, Alessandro Gambella, Jasna Metovic, Mauro Papotti
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Case Study

Adrenal Cortical Neoplasm with Uncertain Malignant Potential Arising in the Heterotopic Adrenal Cortex in the Liver of a Patient with Beckwith-Wiedemann Syndrome: Eun Na Kim, Dong Eun Song, Hee Mang Yoon, Beom Hee Lee, Chong Jai Kim; J Pathol Transl Med. 2019;53(2):129-135. Published online November 26, 2018; DOI: https://doi.org/10.4132/jptm.2018.11.13

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Abstract PDF

Patients with Beckwith-Wiedemann syndrome (BWS) are predisposed to developing embryonal tumors, with hepatoblastoma being the most common type. Our patient showed hemihypertrophy, macroglossia, and paternal uniparental disomy in chromosome 11 and was diagnosed with BWS. When the patient was 9 months old, a 2.5×1.5 cm oval hypoechoic exophytic mass was detected in the inferior tip of his right liver. Preoperative imaging identified it as hepatoblastoma; however, histologic, immunohistochemistry, and electron microscopic findings were compatible with adrenal cortical neoplasm with uncertain malignant potential. The origin of the adrenal tissue seemed to be heterotopic. Here, we describe for the first time an adrenal cortical neoplasm with uncertain malignant potential arising in the heterotopic adrenal cortex located in the liver of a patient with BWS.

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Beckwith–Wiedemann syndrome: Clinical, histopathological and molecular study of two Tunisian patients and review of literature
Hela Sassi, Yasmina Elaribi, Houweyda Jilani, Imen Rejeb, Syrine Hizem, Molka Sebai, Nadia Kasdallah, Habib Bouthour, Samia Hannachi, Jasmin Beygo, Ali Saad, Karin Buiting, Dorra H’mida Ben‐Brahim, Lamia BenJemaa
Molecular Genetics & Genomic Medicine.2021;[Epub] CrossRef
Adrenocortical Tumors in Children With Constitutive Chromosome 11p15 Paternal Uniparental Disomy: Implications for Diagnosis and Treatment
Emilia Modolo Pinto, Carlos Rodriguez-Galindo, Catherine G. Lam, Robert E. Ruiz, Gerard P. Zambetti, Raul C. Ribeiro
Frontiers in Endocrinology.2021;[Epub] CrossRef

Original Article

The Use of the Bethesda System for Reporting Thyroid Cytopathology in Korea: A Nationwide Multicenter Survey by the Korean Society of Endocrine Pathologists: Mimi Kim, Hyo Jin Park, Hye Sook Min, Hyeong Ju Kwon, Chan Kwon Jung, Seoung Wan Chae, Hyun Ju Yoo, Yoo Duk Choi, Mi Ja Lee, Jeong Ja Kwak, Dong Eun Song, Dong Hoon Kim, Hye Kyung Lee, Ji Yeon Kim, Sook Hee Hong, Jang Sihn Sohn, Hyun Seung Lee, So Yeon Park, Soon Won Hong, Mi Kyung Shin; J Pathol Transl Med. 2017;51(4):410-417. Published online June 14, 2017; DOI: https://doi.org/10.4132/jptm.2017.04.05

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Abstract PDF

Background
The Bethesda System for Reporting Thyroid Cytopathology (TBSRTC) has standardized the reporting of thyroid cytology specimens. The objective of the current study was to evaluate the nationwide usage of TBSRTC and assess the malignancy rates in each category of TBSRTC in Korea.
Methods
Questionnaire surveys were used for data collection on the fine needle aspiration (FNA) of thyroid nodules at 74 institutes in 2012. The incidences and follow-up malignancy rates of each category diagnosed from January to December, 2011, in each institute were also collected and analyzed.
Results
Sixty out of 74 institutes answering the surveys reported the results of thyroid FNA in accordance with TBSRTC. The average malignancy rates for resected cases in 15 institutes were as follows: nondiagnostic, 45.6%; benign, 16.5%; atypical of undetermined significance, 68.8%; suspicious for follicular neoplasm (SFN), 30.2%; suspicious for malignancy, 97.5%; malignancy, 99.7%.
Conclusions
More than 80% of Korean institutes were using TBSRTC as of 2012. All malignancy rates other than the SFN and malignancy categories were higher than those reported by other countries. Therefore, the guidelines for treating patients with thyroid nodules in Korea should be revisited based on the malignancy rates reported in this study.

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Review

Pathology Reporting of Thyroid Core Needle Biopsy: A Proposal of the Korean Endocrine Pathology Thyroid Core Needle Biopsy Study Group: Chan Kwon Jung, Hye Sook Min, Hyo Jin Park, Dong Eun Song, Jang Hee Kim, So Yeon Park, Hyunju Yoo, Mi Kyung Shin, Korean Endocrine Pathology Thyroid Core Needle Biopsy Study Group; J Pathol Transl Med. 2015;49(4):288-299. Published online June 17, 2015; DOI: https://doi.org/10.4132/jptm.2015.06.04

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Abstract PDF

In recent years throughout Korea, the use of ultrasound-guided core needle biopsy (CNB) has become common for the preoperative diagnosis of thyroid nodules. However, there is no consensus on the pathology reporting system for thyroid CNB. The Korean Endocrine Pathology Thyroid Core Needle Biopsy Study Group held a conference on thyroid CNB pathology and developed guidelines through contributions from the participants. This article discusses the outcome of the discussions that led to a consensus on the pathology reporting of thyroid CNB.

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Myung Hi Yoo, Hye Jeong Kim, In Ho Choi, Ji-Oh Mok, Hyeong Kyu Park, Dong Won Byun, Kyoil Suh
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Soo Yeon Hahn, Jung Hee Shin, Young Lyun Oh, Ko Woon Park
Korean Journal of Radiology.2019; 20(10): 1454. CrossRef
Preoperative Diagnostic Categories of Noninvasive Follicular Thyroid Neoplasm with Papillary-Like Nuclear Features in Thyroid Core Needle Biopsy and Its Impact on Risk of Malignancy
Hee Young Na, Ji Won Woo, Jae Hoon Moon, June Young Choi, Woo-Jin Jeong, Yeo Koon Kim, Ji-Young Choe, So Yeon Park
Endocrine Pathology.2019; 30(4): 329. CrossRef
Utility of a formatted pathologic reporting system in thyroid core needle biopsy: A validation study of 1998 consecutive cases
Ji‐Young Choe, Yoonjin Kwak, Mimi Kim, Yul Ri Chung, Hyun Jeong Kim, Yeo Koon Kim, So Yeon Park
Clinical Endocrinology.2018; 88(1): 96. CrossRef
Nuclear features of papillary thyroid carcinoma: Comparison of Core needle biopsy and thyroidectomy specimens
Jae Yeon Seok, Jungsuk An, Hyun Yee Cho, Younghye Kim, Seung Yeon Ha
Annals of Diagnostic Pathology.2018; 32: 35. CrossRef
Prevention of total thyroidectomy in noninvasive follicular thyroid neoplasm with papillary‐like nuclear features (NIFTP) based on combined interpretation of ultrasonographic and cytopathologic results
Sung‐Hye You, Kyu Eun Lee, Roh‐Eul Yoo, Hye Jeong Choi, Kyeong Cheon Jung, Jae‐Kyung Won, Koung Mi Kang, Tae Jin Yoon, Seung Hong Choi, Chul‐Ho Sohn, Ji‐hoon Kim
Clinical Endocrinology.2018; 88(1): 114. CrossRef
Statement and Recommendations on Interventional Ultrasound as a Thyroid Diagnostic and Treatment Procedure
Christoph F. Dietrich, Thomas Müller, Jörg Bojunga, Yi Dong, Giovanni Mauri, Maija Radzina, Manjiri Dighe, Xin-Wu Cui, Frank Grünwald, Andreas Schuler, Andre Ignee, Huedayi Korkusuz
Ultrasound in Medicine & Biology.2018; 44(1): 14. CrossRef
Core needle biopsy of thyroid nodules: outcomes and safety from a large single-center single-operator study
Jooae Choe, Jung Hwan Baek, Hye Sun Park, Young Jun Choi, Jeong Hyun Lee
Acta Radiologica.2018; 59(8): 924. CrossRef
Improvement of diagnostic performance of pathologists by reducing the number of pathologists responsible for thyroid fine needle aspiration cytology: An institutional experience
Jae Yeon Seok, Jungsuk An, Hyun Yee Cho
Diagnostic Cytopathology.2018; 46(7): 561. CrossRef
Comparison of Immunohistochemistry and Direct Sanger Sequencing for Detection of theBRAFV600EMutation in Thyroid Neoplasm
Hye-Seon Oh, Hyemi Kwon, Suyeon Park, Mijin Kim, Min Ji Jeon, Tae Yong Kim, Young Kee Shong, Won Bae Kim, Jene Choi, Won Gu Kim, Dong Eun Song
Endocrinology and Metabolism.2018; 33(1): 62. CrossRef
Comparison of the Diagnostic Efficacy of Ultrasound‐Guided Core Needle Biopsy With 18‐ Versus 20‐Gauge Needles for Thyroid Nodules
Hye Shin Ahn, Mirinae Seo, Su Min Ha, Hee Sung Kim
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Impact of Nodule Size on Malignancy Risk Differs according to the Ultrasonography Pattern of Thyroid Nodules
Min Ji Hong, Dong Gyu Na, Jung Hwan Baek, Jin Yong Sung, Ji-Hoon Kim
Korean Journal of Radiology.2018; 19(3): 534. CrossRef
Web‐based thyroid imaging reporting and data system: Malignancy risk of atypia of undetermined significance or follicular lesion of undetermined significance thyroid nodules calculated by a combination of ultrasonography features and biopsy results
Young Jun Choi, Jung Hwan Baek, Jung Hee Shin, Woo Hyun Shim, Seon‐Ok Kim, Won‐Hong Lee, Dong Eun Song, Tae Yong Kim, Ki‐Wook Chung, Jeong Hyun Lee
Head & Neck.2018; 40(9): 1917. CrossRef
Thyroid Incidentalomas Detected on18F-Fluorodeoxyglucose Positron Emission Tomography with Computed Tomography: Malignant Risk Stratification and Management Plan
Sae Rom Chung, Young Jun Choi, Chong Hyun Suh, Hwa Jung Kim, Jong Jin Lee, Won Gu Kim, Tae Yon Sung, Yu-mi Lee, Dong Eun Song, Jeong Hyun Lee, Jung Hwan Baek
Thyroid.2018; 28(6): 762. CrossRef
The role of core needle biopsy in the diagnosis of initially detected thyroid nodules: a systematic review and meta-analysis
Sae Rom Chung, Chong Hyun Suh, Jung Hwan Baek, Young Jun Choi, Jeong Hyun Lee
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The History of Korean Thyroid Pathology
Soon Won Hong, Chan Kwon Jung
International Journal of Thyroidology.2018; 11(1): 15. CrossRef
Ultrasonographic Echogenicity and Histopathologic Correlation of Thyroid Nodules in Core Needle Biopsy Specimens
Ji-hoon Kim, Dong Gyu Na, Hunkyung Lee
Korean Journal of Radiology.2018; 19(4): 673. CrossRef
Evaluation of Modified Core-Needle Biopsy in the Diagnosis of Thyroid Nodules
Soomin Ahn, Sejin Jung, Ji-Ye Kim, Jung Hee Shin, Soo Yeon Hahn, Young Lyun Oh
Korean Journal of Radiology.2018; 19(4): 656. CrossRef
Role of core needle biopsy as a first-line diagnostic tool for thyroid nodules: a retrospective cohort study
Min Ji Hong, Dong Gyu Na, Soo Jin Kim, Dae Sik Kim
Ultrasonography.2018; 37(3): 244. CrossRef
Active Surveillance of Low-Risk Papillary Thyroid Microcarcinoma: A Multi-Center Cohort Study in Korea
Hye-Seon Oh, Jeonghoon Ha, Hye In Kim, Tae Hyuk Kim, Won Gu Kim, Dong-Jun Lim, Tae Yong Kim, Sun Wook Kim, Won Bae Kim, Young Kee Shong, Jae Hoon Chung, Jung Hwan Baek
Thyroid.2018; 28(12): 1587. CrossRef
Risk of malignancy according to sub‐classification of the atypia of undetermined significance or follicular lesion of undetermined significance (AUS/FLUS) category in the Bethesda system for reporting thyroid cytopathology
S. J. Kim, J. Roh, J. H. Baek, S. J. Hong, Y. K. Shong, W. B. Kim, D. E. Song
Cytopathology.2017; 28(1): 65. CrossRef
Fine-needle aspiration versus core needle biopsy for diagnosis of thyroid malignancy and neoplasm: a matched cohort study
Soo-Yeon Kim, Hye Sun Lee, Jieun Moon, Eun-Kyung Kim, Hee Jung Moon, Jung Hyun Yoon, Jin Young Kwak
European Radiology.2017; 27(2): 801. CrossRef
Follicular variant of papillary thyroid carcinoma: comparison of ultrasound-guided core needle biopsy and ultrasound-guided fine needle aspiration in a multicentre study
Soo Yeon Hahn, Jung Hee Shin, Hyun Kyung Lim, So Lyung Jung
Clinical Endocrinology.2017; 86(1): 113. CrossRef
Core‐needle biopsy versus repeat fine‐needle aspiration for thyroid nodules initially read as atypia/follicular lesion of undetermined significance
Young Jun Choi, Jung Hwan Baek, Chong Hyun Suh, Woo Hyun Shim, Boseul Jeong, Jae Kyun Kim, Dong Eun Song, Tae Yong Kim, Ki‐Wook Chung, Jeong Hyun Lee
Head & Neck.2017; 39(2): 361. CrossRef
Preoperative differentiation between noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) and non-NIFTP
Soo Yeon Hahn, Jung Hee Shin, Hyun Kyung Lim, So Lyung Jung, Young Lyun Oh, In Ho Choi, Chan Kwon Jung
Clinical Endocrinology.2017; 86(3): 444. CrossRef
Core Needle Biopsy of the Thyroid: 2016 Consensus Statement and Recommendations from Korean Society of Thyroid Radiology
Dong Gyu Na, Jung Hwan Baek, So Lyung Jung, Ji-hoon Kim, Jin Yong Sung, Kyu Sun Kim, Jeong Hyun Lee, Jung Hee Shin, Yoon Jung Choi, Eun Ju Ha, Hyun Kyung Lim, Soo Jin Kim, Soo Yeon Hahn, Kwang Hwi Lee, Young Jun Choi, Inyoung Youn, Young Joong Kim, Hye Sh
Korean Journal of Radiology.2017; 18(1): 217. CrossRef
First-Line Use of Core Needle Biopsy for High-Yield Preliminary Diagnosis of Thyroid Nodules
H.C. Kim, Y.J. Kim, H.Y. Han, J.M. Yi, J.H. Baek, S.Y. Park, J.Y. Seo, K.W. Kim
American Journal of Neuroradiology.2017; 38(2): 357. CrossRef
Ultrasound-Pathology Discordant Nodules on Core-Needle Biopsy: Malignancy Risk and Management Strategy
Sae Rom Chung, Jung Hwan Baek, Hye Sun Park, Young Jun Choi, Tae-Yon Sung, Dong Eun Song, Tae Yong Kim, Jeong Hyun Lee
Thyroid.2017; 27(5): 707. CrossRef
Current status of core needle biopsy of the thyroid
Jung Hwan Baek
Ultrasonography.2017; 36(2): 83. CrossRef
Cytology-Ultrasonography Risk-Stratification Scoring System Based on Fine-Needle Aspiration Cytology and the Korean-Thyroid Imaging Reporting and Data System
Min Ji Hong, Dong Gyu Na, Jung Hwan Baek, Jin Yong Sung, Ji-Hoon Kim
Thyroid.2017; 27(7): 953. CrossRef
Preoperative clinicopathological characteristics of patients with solitary encapsulated follicular variants of papillary thyroid carcinomas
Hyemi Kwon, Min Ji Jeon, Jong Ho Yoon, Suck Joon Hong, Jeong Hyun Lee, Tae Yong Kim, Young Kee Shong, Won Bae Kim, Won Gu Kim, Dong Eun Song
Journal of Surgical Oncology.2017; 116(6): 746. CrossRef
Active Surveillance for Patients With Papillary Thyroid Microcarcinoma: A Single Center’s Experience in Korea
Hyemi Kwon, Hye-Seon Oh, Mijin Kim, Suyeon Park, Min Ji Jeon, Won Gu Kim, Won Bae Kim, Young Kee Shong, Dong Eun Song, Jung Hwan Baek, Ki-Wook Chung, Tae Yong Kim
The Journal of Clinical Endocrinology & Metabolism.2017; 102(6): 1917. CrossRef
Comparison of Consecutive Results from Fine Needle Aspiration and Core Needle Biopsy in Thyroid Nodules
Soon-Hyun Ahn, So-Yeon Park, Sang Il Choi
Endocrine Pathology.2017; 28(4): 332. CrossRef
Efficacy and safety of core-needle biopsy in initially detected thyroid nodules via propensity score analysis
Chong Hyun Suh, Jung Hwan Baek, Young Jun Choi, Tae Yong Kim, Tae Yon Sung, Dong Eun Song, Jeong Hyun Lee
Scientific Reports.2017;[Epub] CrossRef
Comparison of Core-Needle Biopsy and Fine-Needle Aspiration for Evaluating Thyroid Incidentalomas Detected by 18F-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography: A Propensity Score Analysis
Chong Hyun Suh, Young Jun Choi, Jong Jin Lee, Woo Hyun Shim, Jung Hwan Baek, Han Cheol Chung, Young Kee Shong, Dong Eun Song, Tae Yon Sung, Jeong Hyun Lee
Thyroid.2017; 27(10): 1258. CrossRef
Thyroid Fine-Needle Aspiration Cytology Practice in Korea
Yoon Jin Cha, Ju Yeon Pyo, SoonWon Hong, Jae Yeon Seok, Kyung-Ju Kim, Jee-Young Han, Jeong Mo Bae, Hyeong Ju Kwon, Yeejeong Kim, Kyueng-Whan Min, Soonae Oak, Sunhee Chang
Journal of Pathology and Translational Medicine.2017; 51(6): 521. CrossRef
Recent Advances in Core Needle Biopsy for Thyroid Nodules
Chan Kwon Jung, Jung Hwan Baek
Endocrinology and Metabolism.2017; 32(4): 407. CrossRef
Core-needle biopsy for the preoperative diagnosis of follicular neoplasm in thyroid nodule screening: A validation study
Sung Hak Lee, Gyeong Sin Park, So Lyung Jung, Min-Hee Kim, Ja Seong Bae, Dong Jun Lim, Chan Kwon Jung
Pathology - Research and Practice.2016; 212(1): 44. CrossRef
The Role of Core-Needle Biopsy as a First-Line Diagnostic Tool for Initially Detected Thyroid Nodules
Chong Hyun Suh, Jung Hwan Baek, Jeong Hyun Lee, Young Jun Choi, Jae Kyun Kim, Tae-Yon Sung, Jong Ho Yoon, Young Kee Shong
Thyroid.2016; 26(3): 395. CrossRef
Thyroid nodules with minimal cystic changes have a low risk of malignancy
Dong Gyu Na, Ji-hoon Kim, Dea Sik Kim, Soo Jin Kim
Ultrasonography.2016; 35(2): 153. CrossRef
Thyroid nodules with isolated macrocalcification: malignancy risk and diagnostic efficacy of fine-needle aspiration and core needle biopsy
Dong Gyu Na, Dae Sik Kim, Soo Jin Kim, Jae Wook Ryoo, So Lyung Jung
Ultrasonography.2016; 35(3): 212. CrossRef
Thyroid Imaging Reporting and Data System Risk Stratification of Thyroid Nodules: Categorization Based on Solidity and Echogenicity
Dong Gyu Na, Jung Hwan Baek, Jin Yong Sung, Ji-Hoon Kim, Jae Kyun Kim, Young Jun Choi, Hyobin Seo
Thyroid.2016; 26(4): 562. CrossRef
Fine‐needle aspiration and core needle biopsy: An update on 2 common minimally invasive tissue sampling modalities
Paul A. VanderLaan
Cancer Cytopathology.2016; 124(12): 862. CrossRef
The role of core-needle biopsy in the diagnosis of thyroid malignancy in 4580 patients with 4746 thyroid nodules: a systematic review and meta-analysis
Chong Hyun Suh, Jung Hwan Baek, Jeong Hyun Lee, Young Jun Choi, Kyung Won Kim, Jayoun Lee, Ki-Wook Chung, Young Kee Shong
Endocrine.2016; 54(2): 315. CrossRef
The Role of Core-Needle Biopsy for Thyroid Nodules with Initially Nondiagnostic Fine-Needle Aspiration Results: A Systematic Review and Meta-Analysis
Chong Hyun Suh, Jung Hwan Baek, Kyung Won Kim, Tae Yon Sung, Tae Yong Kim, Dong Eun Song, Young Jun Choi, Jeong Hyun Lee
Endocrine Practice.2016; 22(6): 679. CrossRef
Should Core Needle Biopsy be Used in the Evaluation of Thyroid Nodules?
Beril Guler, Tugce Kiran, Dilek Sema Arici, Erhan Aysan, Fatma Cavide Sonmez
Endocrine Pathology.2016; 27(4): 352. CrossRef
A Multicenter Prospective Validation Study for the Korean Thyroid Imaging Reporting and Data System in Patients with Thyroid Nodules
Eun Ju Ha, Won-Jin Moon, Dong Gyu Na, Young Hen Lee, Nami Choi, Soo Jin Kim, Jae Kyun Kim
Korean Journal of Radiology.2016; 17(5): 811. CrossRef
Impact of Reclassification on Thyroid Nodules with Architectural Atypia: From Non-Invasive Encapsulated Follicular Variant Papillary Thyroid Carcinomas to Non-Invasive Follicular Thyroid Neoplasm with Papillary-Like Nuclear Features
Min Ji Jeon, Dong Eun Song, Chan Kwon Jung, Won Gu Kim, Hyemi Kwon, Yu-Mi Lee, Tae-Yon Sung, Jong Ho Yoon, Ki-Wook Chung, Suck Joon Hong, Jung Hwan Baek, Jeong Hyun Lee, Tae Yong Kim, Young Kee Shong, Won Bae Kim, Rafael Rosell
PLOS ONE.2016; 11(12): e0167756. CrossRef

Case Report

Cellular Pseudosarcomatous Fibroepithelial Stromal Polyp of the Vagina during Pregnancy: A Lesion That Is Overdiagnosed as a Malignant Tumor: Joon Seon Song, Dong Eun Song, Kyu-Rae Kim, Jae Y. Ro; Korean J Pathol. 2012;46(5):494-498. Published online October 25, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.5.494

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Abstract PDF

Fibroepithelial stromal polyp (FSP) is a benign lesion that can occur at various sites, including the lower female genital tract. In rare cases, however, it may exhibit hypercellularity, bizarre cytomorphological features, and atypical mitoses resulting in an overdiagnosis as a malignant tumor despite its benign clinical course. Recently, we experienced one case of a 30-year-old pregnant woman with cellular pseudosarcomatous FSP that was initially diagnosed as a malignant fibrous histiocytoma at a primary clinic. In addition to describing the rare features of this case, we wish to increase awareness about this benign lesion which will be essential for avoiding unnecessary radical surgery or chemoradiation treatment.

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Fibroepithelial Polyp of the Vagina With Torsion: A Difficult Diagnosis Based on Clinical and Morphological Findings of the Vaginal Lesion
Efthymia Thanasa, Anna Thanasa, Gerasimos Kontogeorgis, Ektoras-Evangelos Gerokostas, Ioannis-Rafail Antoniou, Athanasios Chasiotis, Emmanouil M Xydias, Apostolos C Ziogas, Evangelos Kamaretsos, Ioannis Thanasas
Cureus.2024;[Epub] CrossRef
Recurrent fibroepithelial vaginal polyp in a 2-year-old girl: a case report and review of the literature
Mohammad Hakam Shehadeh, Ahmad M. Abualrub, Waleed M. Malhes, Amar Msarweh, Wael Amro
Annals of Medicine & Surgery.2024; 86(4): 2335. CrossRef
A vaginal fibroepithelial stromal polyp: a case report with magnetic resonance images
Naoko Ogura, Mieko Inagaki, Ritsuko Yasuda, Shigeki Yoshida, Tetsuo Maeda
BJR|case reports.2022;[Epub] CrossRef
Fast-growing fibroepithelial stromal vaginal polyp
Ana Marta Pinto, Maria Boia Martins, Isabel Ferreira, Clara Moreira
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Giant hypopharyngeal fibroepithelial polyp: A case report and literature review
Muhammad Nour Alabdullah, Nagham Halaweek, Yasser Al Ghabra, Mohammad Hamdi, Mhd Ayham Abo Trab, Faysal Hajjar
Ear, Nose & Throat Journal.2022; : 014556132211467. CrossRef
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David B. Chapel, Nicole A. Cipriani, Jennifer A. Bennett
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Giant Fibroepithelial Stromal Polyp of the Vulva: Diffusion-Weighted and Conventional Magnetic Resonance Imaging Features and Pathologic Correlation
Joonghyun Yoo, Bo-Kyung Je, Suk Keu Yeom, Ye Sul Park, Kyung-Jin Min, Joo Han Lee
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Original Articles

Microvessel and Lymphatic Vessel Density and VEGFR-3 Expression of Papillary Thyroid Carcinoma with Comparative Analysis of Clinicopathological Characteristics.: Harin Cheong, Hanna Kang, Hyung Kyung Kim, Ji Yoon Bae, Dong Eun Song, Min Sun Cho, Sun Hee Sung, Woon Sup Han, Heasoo Koo; Korean J Pathol. 2010;44(3):243-251.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.3.243

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Abstract PDF

BACKGROUND
This study was done to see if there were correlations between anatomic and molecular parameters such as microvessel density (MVD), lymphatic vessel density (LVD), and vascular endothelial growth factor receptor (VEGFR)-3 expression and various clinical parameters for papillary thyroid carcinomas of size > 1.0 cm (PTCs) and size < or = 1.0 cm (papillary thyroid microcarcinomas, PTMCs). PTMCs were divided into two subgroups (0-5 mm and 6-10 mm).
METHODS
We analyzed 197 thyroid carcinomas including 113 PTCs and 84 PTMCs. Tissue samples form 30 patients from each group matched for clinical characteristics were selected for immunostaining.
RESULTS
Although PTCs and PTMCs showed significant differences in clinical characteristics, they did not show significant difference in MVD, LVD, or VEGFR-3 expression. There was a significantly higher LVD in the PTMC subgroup with the larger tumors but no difference in clinical characteristics. LVD was higher in patients > 45 years old (more apparent in the PTC group) and LVD had suggestive correlations with multicentricity and extrathyroidal extension depending on analytic conditions.
CONCLUSIONS
Since LVD showed variable correlations with clinical variables for papillary carcinoma of the thyroid depending on analytic conditions, the individually planned treatments based on overall clinicopathological factors are advised.

Citations

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Freeze-dried bovine amniotic membrane as a cell delivery scaffold in a porcine model of radiation-induced chronic wounds
Daemyung Oh, Daegu Son, Jinhee Kim, Sun-Young Kwon
Archives of Plastic Surgery.2021; 48(4): 448. CrossRef
Polydeoxyribonucleotide Improves Peripheral Tissue Oxygenation and Accelerates Angiogenesis in Diabetic Foot Ulcers
Seoyoung Kim, Junhyung Kim, Jaehoon Choi, Woonhyeok Jeong, Sunyoung Kwon
Archives of Plastic Surgery.2017; 44(06): 482. CrossRef

Histopathological Evaluation of Pediatric Intestinal Pseudo-Obstruction: Quantitative Morphometric Analysis of Pathological Changes in the Enteric Nervous System.: Hyung Kyung Kim, Harin Cheong, Hanna Kang, Ji Yoon Bae, Dong Eun Song, Min Sun Cho, Sun Hee Sung, Woon Sup Han, Heasoo Koo; Korean J Pathol. 2010;44(2):162-172.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.2.162

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Abstract PDF

BACKGROUND
This study was done to obtain comprehensive data on changes in the structural components of the enteric nervous system in pediatric patients with intestinal pseudo-obstruction (IPO). We evaluated routinely processed, in formalin-fixed tissues by quantitative morphometric analysis. In addition, we used formalin-fixed tissue to explore the possibility of using previously proposed diagnostic criteria to evaluate frozen serial sections for intestinal neuronal dysplasia (IND) type B and hypoganglionosis.
METHODS
We analyzed data for 19 IPO cases. Morphometric analysis for quantification of ganglia and ganglion cells (GCs) was done for the myentric and the submucous plexus. In addition, we determined the presence of immature GCs and the distribution of nerve fibers and interstitial cells of Cajal (ICC).
RESULTS
Nine patients showed combined hypoganglionosis, IND, and decreased ICC; others showed various combinations of these. Several morphometric factors were significantly different between patient groups as well as being different than the control group.
CONCLUSIONS
Our pediatric IPO cases showed extensive overlapping of pathological findings. And the findings suggest the utility of using previously proposed morphometrically measured factors in multiple frozen sections as diagnostic criteria for IND type B and hypoganglionosis in formalin-fixed tissue.

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Histomorphology of enteric neurons and enteric ganglia in different layers of human fetal colon
Chacchu Bhattarai, Phanindra P. Poudel, Arnab Ghosh, Sneha G. Kalthur
Journal of Taibah University Medical Sciences.2022; 17(4): 556. CrossRef
Diagnostic utility of Bcl-2 immunohistochemical expression in pediatric functional bowel obstruction cases with ganglionated specimens
Lobna Abd El Fattah Mohamed, Nedal Ahmed Hegazy, Faten Abd El Aziz Ghazal, Ahmed Mohy El Din Zaki, Ahmed Bassiouny Radwan, Sarah Adel Hakim
Annals of Pediatric Surgery.2022;[Epub] CrossRef
PTEN Immunohistochemistry
Simone Antunes Terra, Pedro Luiz Toledo de Arruda Lourenção,, Maria Aparecida Marchesan Rodrigues
Archives of Pathology & Laboratory Medicine.2022; 147(5): 577. CrossRef
Challenges in the diagnosis of intestinal neuronal dysplasia type B: A look beyond the number of ganglion cells
Simone Antunes Terra, Anderson Cesar Gonçalves, Pedro Luiz Toledo de Arruda Lourenção, Maria Aparecida Marchesan Rodrigues
World Journal of Gastroenterology.2021; 27(44): 7649. CrossRef
Morphometric profile of large intestinal neuronal plexuses in normal perinatal autopsies and Hirschsprung disease
H. Subramanian, B. A. Badhe, P. C. Toi, K. Sambandan
Neurogastroenterology & Motility.2017;[Epub] CrossRef

Frequency of Intrahepatic FoxP3+ Regulatory T cells during the Natural Course of Chronic Hepatitis B: An Immunohistochemical Study Using Needle-Biopsied Liver Tissue.: Ji Yoon Bae, Hyung Kyung Kim, Hanna Kang, Ha Rin Cheong, Dong Eun Song, Sun Hee Sung, Heasoo Koo, Woon Sup Han, Jeong Kyong Lee, Tae Hun Kim, Kyu Won Chung, Min Sun Cho; Korean J Pathol. 2010;44(2):132-140.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.2.132

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Abstract PDF

BACKGROUND
Regulatory T cells (Tregs) may contribute to the immunological hyporesponsiveness against hepatitis B virus (HBV), and this can result in chronic infection. Tregs suppress the T cell responses directed against HBV and they protect hepatocytes by down-regulating the immune responses that cause liver damage, but the role of Tregs has not been well characterized.
METHODS
Fifty four patients were selected and classified into three groups (12 were in the immune-tolerance phase, 35 were in the immune-clearance phase and 7 were in the asymptomatic virus carrier phase). We examined the frequency of CD3+, CD4+ & CD8+ T cells and forkhead box P3 (FoxP3)+ Tregs in the needle-biopsied liver tissue by performing immunohistochemistry.
RESULTS
The FoxP3+ Tregs were mainly located at the portal tracts. In the immune-clearance phase, the frequency of FoxP3+ Tregs was significantly increased compared to that of the immune-tolerance group and the asymptomatic carrier group. Increased FoxP3+ T cells were observed in the patients with a higher histologic inflammatory index. No correlation was observed among the numbers of FoxP3+ Tregs, the serum alanine aminotransferase level, detection of HBeAg and the HBV-DNA viral load.
CONCLUSIONS
FoxP3+ Tregs may play important roles in suppressing the immune response to HBV and the complete elimination of HBV.

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Significance of Foxp3 Positive Regulatory T Cell and Tumor Infiltrating T Lymphocyte in Triple Negative Breast Cancer
Hanna Kang, Harin Cheong, Min Sun Cho, Heasoo Koo, Woon Sup Han, Kyung Eun Lee, Byung In Moon, Sun Hee Sung
The Korean Journal of Pathology.2011; 45(1): 53. CrossRef

Characterization of Histopathological Features that Differentiate Hepatitis B Virus Infection from Acute Cellular Rejection.: Dong Eun Song, Dong Hwan Jung, Shin Hwang, Bong Hee Park, Eunsil Yu; Korean J Pathol. 2009;43(6):535-541.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.6.535

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Abstract PDF

BACKGROUND
Differentiation of viral hepatitis from acute cellular rejection (ACR) after liver transplantation can be difficult because of overlapping histological features. Here we investigated clinicopathologic characteristics of 311 liver allograft biopsies and searched for characteristic histopathological features that would facilitate the differential diagnosis between hepatitis B virus (HBV) infection and ACR. METHODS: A retrospective clinicopathologic examination of 311 liver allograft biopsies consisting of clinically proven ACR or HBV infection was performed. Immunohistochemical staining for HBcAg and HBsAg was done for 64 allograft biopsies showing HBV infection. RESULTS: Moderate to severe bile duct damage, diffuse centrilobular necrosis and centrilobular inflammation (p<0.000, for each) were more frequently observed in cases of ACR, whereas diffuse acidophilic bodies and spotty necrosis (p<0.000, for each) were more prevalent in cases of HBV infection. Immunopositivity for HBcAg (n=60, 93.8%) was higher than that for HBsAg (n=14, 21.9%) CONCLUSIONS: The presence of moderate to severe bile duct damage, diffuse centrilobular necrosis and centrilobular inflammation was a characteristic feature of ACR, whereas diffuse distribution of acidophilic bodies or spotty necrosis was the only characteristic feature of HBV infection. HBcAg was a more sensitive immunohistochemical marker than HBsAg for detecting HBV infection in liver allograft biopsies.

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Analysis of S Gene Mutation of the Hepatitis B Virus in Adult Liver Transplant Recipients Showing Resistance to Hepatitis B Immunoglobulin Therapy
G.-C. Park, S. Hwang, C.-S. Ahn, K.-H. Kim, D.-B. Moon, T.-Y. Ha, G.-W. Song, D.-H. Jung, Y.W. Shin, S.-H. Kim, K.-H. Chang, J.-M. Namgoong, C.-S. Park, H.-W. Park, Y.-H. Park, S.-H. Kang, B.-H. Jung, S.-G. Lee
Transplantation Proceedings.2013; 45(8): 3047. CrossRef
Posttransplantation prophylaxis with primary high-dose hepatitis B immunoglobulin monotherapy and complementary preemptive antiviral add-on
Shin Hwang, Chul-Soo Ahn, Gi-Won Song, Ki-Hun Kim, Deok-Bog Moon, Heung-Bum Oh, Young-Suk Lim, Han Chu Lee, Tae-Yong Ha, Dong-Hwan Jung, Young-Hwa Chung, Sung-Gyu Lee
Liver Transplantation.2011; 17(4): 456. CrossRef
Posttransplantation Prophylaxis with Primary High-dose Hepatitis B Immunoglobulin Monotherapy and Complementary Preemptive Antiviral Add-on. Liver Transpl 2011;17:456-465
Dong-Hwan Jung, Shin Hwang
The Korean Journal of Gastroenterology.2011; 57(5): 330. CrossRef

Review

Differential Diagnosis of Fine Needle Aspiration Cytology of Benign Lymphadenopathy.: Eun Mee Han, Dong Eun Song, Dae Un Eom, Hye Jeong Choi, Hee Jeong Cha, Jooryung Huh; Korean J Cytopathol. 2006;17(2):99-107.

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Abstract PDF: In the investigation of superficial lymphadenopathy of unknown cause, fine needle aspiration (FNA) cytology plays an invaluable role. It enables the differentiation of benign lymphadenopathy from lymphoid and non-lymphoid malignancies, obviating the need for open biopsy, and allowing the triage of patients. Cytopathologists should be familiar with the typical FNA patterns of benign lymphadenopathy, and recognize and differentiate among categories. In a minority of cases of benign lymphadenopathy, FNA can render a specific diagnosis. Benign lymphadenopathies are generally categorized into reactive lymphoid hyperplasia (RLH), inflammatory or infectious processes, and benign lymphoproliferative disorders. RLH characteristically presents with a heterogeneous and polymorphous smear composed of normal cellular constituents of lymph nodes, in contrast with the homogeneous or monomorphic smear of most lymphomas. The caveat is that various malignant disorders may also present with polymorphous populations. It is also important to recognize thatbenign lymphoid smears may sometimes contain atypical cells that raise the suspicion of malignancy. Clinical information should always be the integral part of the diagnostic criteria in FNA of lymphadenopathy. If there is any doubt about the benign nature of the smear, it is prudent to suggest biopsy and ancillary studies.

Original Article

Clinicopathologic Analysis of Lymphocytic Gastritis.: Jeong Eun Hwang, Young Ok Hong, Dong Eun Song, Se Jin Jang, Eunsil Yu; Korean J Pathol. 2007;41(5):289-295.

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Abstract PDF: BACKGROUND
Lymphocytic gastritis (LG) is defined as an infiltration of more than 25 intraepithelial lymphocytes (IELs) per 100 surface epithelial cells, and the histological differential diagnosis of LG and residual mucosa associated lymphoid tissue (MALT) lymphoma can be difficult. Helicobacter pylori (H. pylori) is regarded as one of the possible causes of LG, but its clinicopathologic features of LG have not been clarified in Korea, which has a much higher prevalence of H. pylori infection than Western countries. We analyzed the clinicopathologic findings of LG in Korean patients and compared the cytologic findings of IELs of LG with those of MALT lymphoma.
METHODS
Sixty six cases of LG and 59 cases of MALT lymphoma were selected and clinicopathologic features were analyzed.
RESULTS
Eighteen cases (27.3%) of LG were found to be associated with H. pylori infection. The IELs in LG were found to diffusely and regularly infiltrate in the epithelium, but MALT lymphoma showed patchy IELs. IELs in LG and MALT lymphoma were CD 8+T lymphocytes and CD20+B lymphocytes, respectively. The mean nuclear size of IELs in LG was 4.37 micrometer, which was significantly smaller than those in MALT lymphoma (5.19 micrometer).
CONCLUSION
LG, a rare variant of chronic gastritis is partly associated with H. pylori infection and more complex unknown causative factors. In addition to the immunophenotyping, the nuclear sizes of IELs can be helpful in the differential diagnosis of LG and residual MALT lymphoma.

Case Report

Placental Findings of Listeria Monocytogenes Infection in Twin Pregnancy: A Case Report.: Dong Hoon Shin, Dong Eun Song, Kyu Rae Kim; Korean J Pathol. 2007;41(2):119-122.

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Abstract PDF: A Listeria monocytogenes infection is relatively rare in healthy adults. However, the chance of an infection increases almost 17 times in pregnancy due to changes in the immune function. A Listeria monocytogenes infection results in characteristic gross and microscopic features in the placenta, including multiple yellowish nodules showing microscopic intervillous abscess and intervillositis. We describe the placental findings of a Listeria monocytogenes infection that was complicated by maternal sepsis, myocarditis and congestive heart failure. The infection was discovered in the 34th week of a twin gestation in a 28 year-old woman. This case should emphasize the importance of this condition to pathologists. Antibiotic treatment was started based on the placental histologic findings before a maternal blood culture confirmed growth of Listeria monocytogenes. Both the mother and twin babies were healthy at the time of this report.

Original Article

Expression of the 14-3-3 sigma Protein and Methylation Status of the 14-3-3 sigma gene in Biliary Neoplasms.: Dong Eun Song, Se Jin Jang, Jung Sun Kim, Sang Soo Lee, Myung Hwan Kim, Seung Gyu Lee, Young Joo Lee, Hae Joung Park, Yhong Hee Shim, Eunsil Yu; Korean J Pathol. 2006;40(1):9-16.

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Abstract PDF: BACKGROUND
The 14-3-3 sigma (sigma) protein has a negative regulatory role in the cell cycle progression of the. Down-regulation or overexpression of the 14-3-3 sigma protein has been reported in various human cancers.
METHODS
Immunohistochemistry for the 14-3-3 sigma protein was performed in non-neoplastic bile duct cells, intraductal papillary neoplasms of the liver (IPNL), mass-forming intrahepatic cholangiocarcinomas (ICC) and non-papillary extrahepatic cholangiocarcinomas (ECC). We investigated the methylation status of the 14-3-3 sigma gene in 45 cases of these 3 tumor groups.
RESULTS
The non-neoplastic bile duct cells demonstrated negative or weakly positive cytoplasmic immunoreactivity for the 14-3-3 sigma protein and no methylation of the 14-3-3 sigma gene. Overexpression as well as negative immunoreactivity associated with hypermethylation of the 14-3-3 sigma protein was observed in 16 (69.6%) of 23 cases of IPNL, in 21 (63.6%) of 33 cases of mass-forming ICC and in 27 (71.1%) of 38 cases of non-papillary ECC. Negative immunoreactivity was increased in the invasive IPNL (4/6, 66.7%), as well as in the poorly differentiated cases of mass-forming ICC (8/12, 66.7%) and the non-papillary ECC (5/8, 62.5%).
CONCLUSIONS
The similar rates for the abnormal expression of the 14-3-3 sigma protein among the three groups of biliary neoplasms indicate its general association with biliary carcinogenesis. Furthermore, the loss of the 14-3-3 sigma protein may be involved in the tumor progression and differentiation in the biliary carcinogenesis.

Case Reports

Localized Amyloidosis of the Ureter: A Report of Two Cases.: Ho Jung Lee, Dong Eun Song, Jong Eun Joo, Won Mi Lee, Dong Hoon Kim, Eun Kyung Kim, Jae Y Ro; Korean J Pathol. 2004;38(3):184-187.

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Abstract PDF: We report on two cases of localized amyloidosis involving the ureter. The patients were a 64-year-old woman with right upper quadrant pain (case 1) and a 36-year-old woman suffering from left flank pain and intermittent gross hematuria (case 2). An intravenous pyelography of case 1 revealed multiple filling defects in the entire right ureter, whereas retrograde pyelography in case 2 showed diffuse narrowing in the mid and lower portions of the left ureter. Localized amyloidosis of the ureter was diagnosed in the two cases, and both had amyloid deposit in the renal pelvis and the urinary bladder in case 1, and in the contralateral ureter and the renal pelvis in case 2. Right nephroureterectomy was performed in case 1, but a segmental resection of the ureter with preservation of the kidney was administered in case 2. These two cases demonstrate that ureteral amyloidosis can be associated with amyloid deposition in the renal pelvis and the urinary bladder. Although ureteral amyloidosis is a rare occurrence, it should be considered in the differential diagnosis of ureteral obstruction to avoid unnecessary radical surgery.

Primary Mucinous Cystic Neoplasm of the Retroperitoneum: A Report of Three Cases.: Dong Eun Song, Mi Jung Kim, Shin Kwang Shin, Eunsil Yu, Kyung Ja Cho; Korean J Pathol. 2003;37(3):204-209.

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Abstract PDF: Primary mucinous cystic neoplasms of the retroperitoneum in women are rare and show histologic features similar to their ovarian or pancreatic counterparts. We present three cases of primary retroperitoneal mucinous neoplasms of variable malignant potentials including a cystadenocarcinoma in a 50-year-old woman, a cystic neoplasm of borderline malignancy in a 31-year-old woman, and a cystadenoma in a 67-year-old woman. All cases showed histologic features similar to mucinous tumors of the ovary. Immunohistochemical study demonstrated positivity for calretinin in case 3. The histogenesis of these neoplasms can be assumed most likely to be mucinous metaplasia of the mesothelium or undetected heterotopic pancreatic tissue. Appropriate management is thought to be the same as for analogous ovarian neoplasms.

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