title: Macrocystic serous cystadenoma mimicking branch duct intraductal papillary mucinous neoplasm.
abstract: A 29-year-old woman was referred to our hospital with a pancreatic cystic tumor diagnosed by computed tomography and magnetic resonance imaging. Endoscopic retrograde cholangiopancreatography was performed, wherein macrocystic serous cystadenoma of the pancreas was diagnosed. It was decided to observe the progress of the disease. The tumor diameter increased over 18 months to > 50 mm. Its growth rate was slower than the average rate of serous cystadenoma described in previous reports, but its form become warped and shaped like bunches of grapes. A branch duct variant of intraductal papillary mucinous neoplasm could not be excluded. Laparoscope-assisted distal pancreatectomy was performed, and the pathological diagnosis was macrocystic serous cystadenoma. Some macrocystic serous cystadenomas are like an intraductal papillary mucinous neoplasm, and differential diagnosis is very difficult. The macrocystic serous cystadenoma is a rare lesion, but it should be considered when diagnosing cystic tumors of the pancreas.
authors.affiliation: Department of General Surgical Science (Surgery I), Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma 371-8511, Japan. tkobaya@med.gunma-u.ac.jp
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Kobayashi
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Shimura
authors.forename: Ken-ichiro
authors.initials: K
authors.lastname: Araki
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Mochida
authors.forename: Hideki
authors.initials: H
authors.lastname: Suzuki
authors.forename: Taketoshi
authors.initials: T
authors.lastname: Suehiro
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kuwano
mesh_terms: D000328:Adult; D021441:Carcinoma, Pancreatic Ductal / Q000175:diagnosis; D018293:Cystadenoma, Serous / Q000175:diagnosis* / Q000601:surgery; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D010535:Laparoscopy; D008279:Magnetic Resonance Imaging; D010180:Pancreatectomy / Q000379:methods*; D010190:Pancreatic Neoplasms / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed