Successful resection of a neuroendocrine tumor in the gallbladder: a case report

Surgical Case Reports

Tomoko Wakasa¹  Yoshio Ohta¹  Shuichi Fukuda²  Masao Yukawa²  Jin-ichi Hida²  Kotaro Kitani²  Hideo Tomihara²  Katsuya Ohta²  Tomoyuki Tsujimoto²  Hajime Ishikawa²  Kazuhiko Hashimoto²  Atsushi Gakuhara² 

[1] Department of Pathology and Laboratory, Kindai University Nara Hospital, Otoda-cho 1248-1, 630-0293, Ikoma, Nara, Japan;Department of Surgery, Kindai University Nara Hospital, Otoda-cho 1248-1, 630-0293, Ikoma, Nara, Japan;

关键词: Gallbladder;    Neuroendocrine tumor;    Carcinoid;   

DOI  :  10.1186/s40792-020-01055-w

来源: Springer

【 摘 要 】

BackgroundGallbladder neuroendocrine tumors (GB-NETs) are extremely rare, representing only 0.5% of all NETs because no neuroectodermal cells are present in the gallbladder. In 2019, the World Health Organization updated the classification of NETs based on their molecular differences. The mutation status of DAXX and ATRX has been added to the criteria for well-differentiated NETs.Case presentationA 50-year-old man presented to our hospital for further examination of a gallbladder polyp. He had no right quadrant pain, fever, jaundice, weight loss, or carcinoid syndrome-related symptoms. The patient hoped to avoid cholecystectomy. During the 3-year observation period, the polyp gradually increased in size from 8.3 to 9.9 mm. He decided to undergo surgery, and whole cholecystectomy was successfully performed. Immunohistochemical staining revealed positivity for chromogranin A, synaptophysin, and CD56. The Ki-67 index was < 3%. Taken together, these results led to a diagnosis of a grade 1 GB-NET. We also performed immunohistochemical staining of DAXX and ATRX, which revealed that DAXX protein expression was negative. The patient’s postoperative course was uneventful, and he developed no recurrence for 8 years after surgery.ConclusionWe experienced a very rare case of GB-NET. Obtaining a correct preoperative diagnosis is quite difficult at the first evaluation. A GB-NET should be considered as a differential diagnosis of gallbladder tumors.

【 授权许可】

CC BY