title: [A case of epidermoid cyst in an intrapancreatic accessory spleen showing cyst-in-cyst-like structure mimicking mucinous cystic neoplasm].
abstract: In 2010, a 39-year-old woman presented with a cystic lesion, 16 mm in diameter, in the tail of the pancreas. Regular follow-ups were conducted to monitor this lesion; its diameter was found to increase to 45 mm in 2013. Thus, the patient was admitted to our hospital for further examination and treatment. Abdominal US, abdominal contrast-enhanced CT, and MRI showed a cystic lesion of 45 mm in diameter in the tail of the pancreas, which had internal septae and mural nodules inside. EUS revealed a cyst-in-cyst-like structure, with a thickened cystic wall along the entire circumference. Thus, distal pancreatectomy and splenectomy were performed on the basis of a diagnosis of mucinous cystic neoplasm. Histopathological examination of a resected specimen showed that the lesion comprised a substantial component of red-brown tone, with adjacent cystic components. The final diagnosis was an epidermoid cyst in an intrapancreatic accessory spleen.
authors.affiliation: Department of Gastroenterology, Kobe University Graduate School of Medicine.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Hirata
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Arisaka
authors.forename: Hiromu
authors.initials: H
authors.lastname: Kutsumi
authors.forename: Arata
authors.initials: A
authors.lastname: Sakai
authors.forename: Mamoru
authors.initials: M
authors.lastname: Takenaka
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Shiomi
authors.forename: Takeshi
authors.initials: T
authors.lastname: Azuma
authors.forename: Ippei
authors.initials: I
authors.lastname: Matsumoto
authors.forename: Shigeo
authors.initials: S
authors.lastname: Hara
authors.forename: Shujiro
authors.initials: S
authors.lastname: Yazumi
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004814:Epidermal Cyst / Q000175:diagnosis*; D005260:Female; D006801:Humans; D064847:Multimodal Imaging; D018297:Neoplasms, Cystic, Mucinous, and Serous / Q000175:diagnosis*; D013158:Splenic Diseases / Q000175:diagnosis*; D013160:Splenic Neoplasms / Q000175:diagnosis*