A Case of Dermoid Cyst of the Pancreas

Shinji Onda, Seiya Yoshida, Tetsuya Kajimoto, Yasuhiko Endo¹⁾ and Katsuhiko Yanaga²⁾

Department of Surgery and Department of Pathology and Laboratory Medicine¹⁾, Fuji City Central Hospital
Department of Surgery, The Jikei University School of Medicine²⁾

A 65-year-old man was found in computed tomography (CT) during hospitalization for ischemic colitis to have a 4.5×3.5 cm cystic mass arising from the pancreatic tail. With the absence of pancreatic duct dilation, the cystic mass was diagnosed as a branch duct intraductal papillary mucinous neoplasm (IPMN), and the man was followed up as an outpatient. After he reported back pain, a workup CT two months later showed that the IPMN had grown and serum CA19-9 was elevated. On suspicion of malignancy, he underwent distal pancreatectomy, with the spleen also resected. Histologically, the cystic mass was diagnosed as a dermoid cyst. Such a tumor of the pancreas is extremely uncommon and, to our knowledge, only 21 cases have been reported in the English and Japanese literature.

Key words
dermoid cyst, pancreas

Reprint requests
Shinji Onda Department of Surgery, Fuji City Central Hospital
50 Takashimacho, Fuji, 417-8567 JAPAN

Accepted
September 16, 2009

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