{"title":"Aberrant Expression of Pneumocytic Markers (TTF-1 and Napsin-A) in Biliary Duct and Gallbladder Adenocarcinomas; A Potential Diagnostic Pitfall.","authors":"Rutvij Khedkar, Radhika Agrawal, Subhash Yadav, Rajiv Kumar Kaushal","doi":"10.1177/10668969241286082","DOIUrl":null,"url":null,"abstract":"<p><p>Cholangiocarcinomas and gallbladder carcinomas are epithelial tumours with biliary differentiation. On histology and immunohistochemistry, they resemble adenocarcinomas and possess overlapping immunohistochemical profiles. Diagnosing these tumours is best done using appropriate imaging and clinical features with compatible immunohistochemistry. Immuno-staining for thyroid transcription factor-1 (TTF-1) and novel aspartic proteinase of pepsin A (Napsin-A) is believed to be specific for primary pulmonary adenocarcinomas. We herein report uncommon instances of strong and diffuse expression of these markers in two examples of adenocarcinomas arising from the bile duct and gallbladder. A review of the literature and a summary of similar studies relating to aberrant TTF-1 and Napsin-A expression in biliary tract adenocarcinomas are presented.</p>","PeriodicalId":14416,"journal":{"name":"International Journal of Surgical Pathology","volume":null,"pages":null},"PeriodicalIF":0.9000,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Surgical Pathology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1177/10668969241286082","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PATHOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Cholangiocarcinomas and gallbladder carcinomas are epithelial tumours with biliary differentiation. On histology and immunohistochemistry, they resemble adenocarcinomas and possess overlapping immunohistochemical profiles. Diagnosing these tumours is best done using appropriate imaging and clinical features with compatible immunohistochemistry. Immuno-staining for thyroid transcription factor-1 (TTF-1) and novel aspartic proteinase of pepsin A (Napsin-A) is believed to be specific for primary pulmonary adenocarcinomas. We herein report uncommon instances of strong and diffuse expression of these markers in two examples of adenocarcinomas arising from the bile duct and gallbladder. A review of the literature and a summary of similar studies relating to aberrant TTF-1 and Napsin-A expression in biliary tract adenocarcinomas are presented.
期刊介绍：
International Journal of Surgical Pathology (IJSP) is a peer-reviewed journal published eight times a year, which offers original research and observations covering all major organ systems, timely reviews of new techniques and procedures, discussions of controversies in surgical pathology, case reports, and images in pathology. This journal is a member of the Committee on Publication Ethics (COPE).
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