A case of epidermoid cyst of the intrapancreatic accessory spleen

A 54-year-old woman presented with a huge palpable mass on left upper quadr ant of the abdomen. After preoperative work-up, a cystic disease of pancrea tic tail or accessory spleen was initially suspected. We performed explorat ory laparotomy and resected both the spleen and a 15x11 cm-sized huge cysti c mass containing a part of solid component which extended continuously to the pancreatic tail. The solid component, comprising the upper portion of t he resected cyst, was reddish brown and granular like as normal splenic tis sue. The inner surface of the cyst was smooth and was filled with yellowish white material. Histologic examination showed an epidermoid cyst originati ng in the accessory spleen of the pancreatic tail lacking hair or skin appe ndages.