title: Coexistence of small cell neuroendocrine carcinoma and villous adenoma in the ampulla of Vater.
abstract: Small cell neuroendocrine carcinoma of the ampulla of Vater is extremely rare and different from the common ampullary adenocarcinoma. The ampullary adenoma is also a rare neoplasm and has the potential to develop an adenocarcinoma. Their coexistence has been rarely reported in the literature. We herein describe an unusual case of a small cell neuroendocrine carcinoma associated with a villous adenoma in the ampulla of Vater with emphasis on computed tomography (CT) and histopathological findings. We also discuss their clinical, histopathological and radiological features as well as possible histogenesis.
authors.affiliation: Department of Radiology, Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou, Zhejiang Province, China.
authors.forename: Ji-Hong
authors.initials: JH
authors.lastname: Sun
authors.forename: Ming
authors.initials: M
authors.lastname: Chao
authors.forename: Shi-Zheng
authors.initials: SZ
authors.lastname: Zhang
authors.forename: Guang-Qiang
authors.initials: GQ
authors.lastname: Zhang
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.forename: Jian-Jun
authors.initials: JJ
authors.lastname: Wu
mesh_terms: D018253:Adenoma, Villous / Q000150:complications* / Q000175:diagnosis; D000368:Aged; D014670:Ampulla of Vater; D018278:Carcinoma, Neuroendocrine / Q000150:complications* / Q000175:diagnosis; D003135:Common Bile Duct / Q000000981:diagnostic imaging / Q000473:pathology; D003138:Common Bile Duct Neoplasms / Q000150:complications* / Q000175:diagnosis; D006801:Humans; D008297:Male; D014057:Tomography, X-Ray Computed