抄録
A boy aged 6 years was admitted with a history of recurrent attacks of non-bilious vomiting for approximately one year. Ultrasound, X-ray and endoscopic examinations showed nearly comlete obstruciton of the pylorus and malrotation of the intestine. Partial gastrectomy and Ladd's procedure were performed under the preoperative diagnosis of pyloric obstruciton due to channel ulcer. Pathologic examination revealed heterotopic pancreatic tissue (Heinrich type I) with periductal inflammatory reaction, marked hypertrophy of the pyloric muscle and nodular hyperplasia of Brunner's gland. The stenosis was caused by hypertrophy of the pyloric muscle associated with heterotopic pancreatic tissue and concomitant inflammation.
