Abstract
This paper describes a case of mucin-producing duodenal carcinoma arising from the aberrant pancreas. An 81-year-old woman was seen at a nearby hospital because of appetite loss as the chief complaint. She was found to have an ulcerative lesion in the wall of the duodenal bulb and was admitted to our department for close examiation. CT scanning showed a tumor (2cm in diameter) with a cystic change in the bulb. Gastrointestinal endoscopy revealed two depressed lesions on the greater wall of hte duodenal bulb. Biopsy revealed adenocarcinoma. Under a diagnosis of advanced cancer of the duodenal bulb, laparotomy was performed. Since peritoneal lavage cytology showed malignant cells, distal gas-trectomy was peformed. Histologically the tumor was a papillary and partially mucinous adenocarcinoma found mostly in the muscularis propria. The aberrant pancreas (Heinrich I type) with acinar cells, pancreatic ducts and Langerhans' islets bordered on the tumor. Adenocarcinoma arising from the aberrant pancreas was diagnosed from these findings. To our knowledge, this is the fourth case reported in the Japanese literature.
