Intraductal oncocytic papillary neoplasm arising in Peutz-Jeghers Syndrome bile duct: a unique case report

Diagnostic Pathology

Case Report

Chengli Liu¹  Li Ren²  Chaoran Yu²  Jianping Zhu²  Teng Li²  Zhiyu Wang²  Qingyue Liu³  Xiangsheng Li⁴ 

[1] Department of Hepatobiliary Surgery, Air Force Medical Center, PLA, Beijing, People’s Republic of China;Department of Pathology, Air Force Medical Center, PLA, Beijing, People’s Republic of China;Department of Pathology, Air Force Medical Center, PLA, Beijing, People’s Republic of China;China Medical University, Shenyang, People’s Republic of China;Department of Radiology, Air Force Medical Center, PLA, Beijing, People’s Republic of China;

关键词: Peutz-Jeghers syndrome;    Intraductal oncocytic papillary neoplasm;    GNAS;    STK11;    EGFR;   

DOI  :  10.1186/s13000-022-01275-8

 received in 2022-07-15, accepted in 2022-12-19,  发布年份 2022

来源: Springer

【 摘 要 】

BackgroundPeutz-Jeghers syndrome (PJS) is a rare, autosomal dominant disorder caused by germline mutations of STK11/LKB1, with an increased risk of tumors at multiple sites. Intraductal oncocytic papillary neoplasm (IOPN) is a unique subtype of intraductal papillary neoplasm of the bile duct (IPNB) defined by a premalignant neoplasm with intraductal papillary or villous growth of biliary-type epithelium. IOPN has a distinct mutation profile compared with both IPNB and intraductal papillary mucinous neoplasm (IPMN).Case presentationWe herein describe the case of a 44-year-old woman who presented as polyps in the intestinal lumen of sigmoid colon and a 3.1 × 2.1 cm mass in the left lobe of liver. Gross feature revealed a cystic papillary mass and the neoplasm had a clear boundary with the surrounding liver tissue. Histology revealed complex papillary structures, a small amount of fine fibrovascular cores and immunohistochemistry showed extensive positive for MUC5AC, MUC6, CD117. Therefore, histological and immunohistochemical examination of the liver tumor suggested the diagnosis of IOPN. Next-generation sequencing (NGS) revealed other than STK11 germline mutation, the tumor also harbors GNAS somatic mutation at codon 478 and EGFR amplification.ConclusionTo our knowledge, this is the first report of IOPN arising in PJS. This case enlarges the spectrum of PJS related tumors and genetic rearrangements in IOPN.

【 授权许可】

CC BY   
© The Author(s) 2022

【 图 表 】

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