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Oncocytic Type Intraductal Papillary Mucinous Neoplasm of the Pancreas with Unusually Low Mucin Production Mimicking Intraductal Tubulopapillary Neoplasm: A Report of a Case Diagnosed by a Preoperative Endoscopic Biopsy.

Oncocytic Type Intraductal Papillary Mucinous Neoplasm of the Pancreas with Unusually Low Mucin Production Mimicking Intraductal Tubulopapillary Neoplasm: A Report of a Case Diagnosed by a Preoperative Endoscopic Biopsy.
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Yoshida Y, Endo T, Tanaka E, Kikuchi T, Akino K, Mita H, Adachi Y, Nakamura M, Adachi Y, Ishii Y, Matsumoto J, Hirano S, Nitta T, Mitsuhashi T, Kato Y,


Yoshida Y, Endo T, Tanaka E, Kikuchi T, Akino K, Mita H, Adachi Y, Nakamura M, Adachi Y, Ishii Y, Matsumoto J, Hirano S, Nitta T, Mitsuhashi T, Kato Y, (click to view)

Yoshida Y, Endo T, Tanaka E, Kikuchi T, Akino K, Mita H, Adachi Y, Nakamura M, Adachi Y, Ishii Y, Matsumoto J, Hirano S, Nitta T, Mitsuhashi T, Kato Y,

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Internal medicine (Tokyo, Japan) 2017 10 11() doi 10.2169/internalmedicine.9053-17
Abstract

We herein report the case of a 78-year-old woman with an intraductal tumor with scant mucin production in a moderately dilated main pancreatic duct that resembled an intraductal tubulopapillary neoplasm (ITPN) on imaging. An endoscopic transpapillary forceps biopsy enabled an accurate preoperative diagnosis of the tumor as an oncocytic type intraductal papillary mucinous neoplasm (IPMN) of the pancreas microscopically showing papillary growth consisting of oncocytic cells with a typical mucin expression profile, although with few intraepithelial lumina containing mucin. This is the first case of an oncocytic type IPMN mimicking an ITPN that was able to be diagnosed preoperatively.

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