1980 年 16 巻 7 号 p. 1217-1220
A fifteen day old baby underwent a Ramstedt's procedure for hypertrophic pyloric stonosis, At operation, a small tumor in the hypertrophic pyloric muscle was found at the contralateral side of the myotomy. The tumor was excised without perforation of the mucus memmbrane. Histologically, the tumor was adenomyoma. The postoperative course was uneventful. It is suspected that these diseases have no interrelationship each other. Extirpation of the adenomyoma without resection of pylorus is thechoice of procedure. This combination seems the first in literature.