Abstract
A 72 year-old man was admitted due to appetite loss to our hospital. A routine gas-troduodenoscopy revealed a tumor with an irregular ulcer of the fourth portion of the duode-num. Re-examination of the duodenal tumor, using a pediatric colonoscopy (PCF240I, OLYMPUS, Tokyo), led to a diagnosis of moderately-differentiated adenocarcinoma by biopsy. We segmentally resected the duodenum, and dissected the lymph nodes and vessels. The postoperative diagnosis was a primary adenocarcinoma of the fourth portion of the duodenum, T3N1M0 Stage III. Most primary adenocarcinomas of the fourth portion of the duodenum cannot be detected by routine gastroduodenoscopy due to their location. We report here a duodenal cancer of the fourth portion detected by routine gastroduodenoscopy.
