Article

Journal of Hepato-Biliary-Pancreatic Surgery

, Volume 11, Issue 1, pp 61-63

First online:

Epidermoid cyst in an intrapancreatic accessory spleen: a case report

  • Hidetoshi KanazawaAffiliated withDivision of Surgical Oncology, Department of Surgery, Nagoya University, Graduate School of Medicine
  • , Junichi KamiyaAffiliated withDivision of Surgical Oncology, Department of Surgery, Nagoya University, Graduate School of Medicine
  • , Masato NaginoAffiliated withDivision of Surgical Oncology, Department of Surgery, Nagoya University, Graduate School of Medicine
  • , Katuhiko UesakaAffiliated withDivision of Surgical Oncology, Department of Surgery, Nagoya University, Graduate School of Medicine
  • , Norihiro YuasaAffiliated withDivision of Surgical Oncology, Department of Surgery, Nagoya University, Graduate School of Medicine
  • , Koji OdaAffiliated withDivision of Surgical Oncology, Department of Surgery, Nagoya University, Graduate School of Medicine
  • , Toshiyuki AraiAffiliated withDivision of Surgical Oncology, Department of Surgery, Nagoya University, Graduate School of Medicine
  • , Hideki NishioAffiliated withDivision of Surgical Oncology, Department of Surgery, Nagoya University, Graduate School of Medicine
  • , Yuji NimuraAffiliated withDivision of Surgical Oncology, Department of Surgery, Nagoya University, Graduate School of Medicine

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Abstract

Ectopic splenic tissue in the abdominal cavity is a common entity, with a reported incidence of 10% in the general population. However, an intrapancreatic accessory spleen is a rare disease, and moreover cyst formation in it is exceedingly rare. A 58-year-old woman with a 25-mm multilocular cyst in the tail of the pancreas detected incidentally by ultrasonography was admitted for further evaluation. Because malignancy could not be ruled out, a spleen-preserving distal pancreatectomy was performed. The cut surface of the surgical specimen showed a multilocular cyst surrounded by brown solid tissue resembling normal spleen. Pathological examination revealed it was stratified squamous epithelium and was surrounded by splenic tissue. The final pathological diagnosis was epidermoid cyst in an accessory spleen in the pancreas. This cyst has no characteristic features on diagnostic imaging. Consequently, it is not possible to make a definite preoperative diagnosis in most cases. Epidermoid cyst in intrapancreatic splenic tissue is another lesion to be considered in the differential diagnosis of pancreatic tail tumors.

Key words

Epidermoid cyst Intrapancreatic accessory spleen