-Case Reports-

A Case of Intra-abdominal Endocrine Tumor Possibly Arising from an Ectopic Pancreas

Masao Ogata¹, Naoto Chihara¹, Tetsuro Matsunobu¹, Masaki Koizumi¹, Masanori Yoshino¹, Takeshi Shioya¹, Masanori Watanabe¹, Akira Tokunaga¹, Takashi Tajiri² and Koshi Matsumoto³

¹Institute of Gastroenterology, Nippon Medical School Musashi-Kosugi Hospital
²Surgery for Organ Function and Biological Regulation, Graduate School of Medicine, Nippon Medical School
³Department of Pathology, Nippon Medical School Musashi-Kosugi Hospital

We report an intra-abdominal endocrine tumor possibly arising from an ectopic pancreas. A 45-year-old woman visited the Nippon Medical School Musashi-Kosugi Hospital because of right-sided hypochondralgia and upper abdominal discomfort of 1 year's duration. An intra-abdominal tumor was diagnosed on the basis of the results of an ultrasound examination, computed tomography and magnetic resonance. Surgery was subsequently performed using laparoscopic techniques, and a tumor without firm adhesions was found near the wall of the duodenal bulbus. The tumor was easily removed; the resected specimen (55 × 45 × 25 mm, 50 g) was composed of bloody fluid within a cystic tumor. Histological and immunohistochemical examinations of the tumor showed a type 3 ectopic pancreas, according to the classification proposed by Heinrich. The patient's recovery was uneventful.

J Nippon Med Sch 2007; 74: 168-172

Keywords
ectopic pancreas, Heinrich classification, endocrine tumor

Correspondence to
Masao Ogata, MD, Institute of Gastroenterology, Nippon Medical School Musashi-Kosugi Hospital, 1-396 Kosugi-cho, Nakahara-ku, Kawasaki, Kanagawa 211-8533, Japan
masao@nms.ac.jp

Received, January 9, 2007
Accepted, January 30, 2007