A CASE OF GASTRIC DUPLICATION ASSOCIATED WITH GASTRIC CANCER INVADING THE WALL OF THE DUPLICATED STOMACH

Abstract

Gastric duplication, a congenital malformation, is one of duplication of the intestine. It is rare and so far less than 100 cases have been reported in Japan. We report a case of gastric duplication with gastric cancer which invaded the wall of the duplication stomach.
A 66-year-old woman diagnosed as having gastric cancer on the greater curvature of the lower part of the stomach in August 2001 was found to have a cystic tumor 11×6cm in diameter in the right upper quadrant of the abdomen on upper abdominal CT scan and echogram. A distal gastrectomy including the cystic tumor adherent to the stomach was performed. Histopathological study disclosed that smooth muscle continued to the proper muscle layer of the stomach was present in the cyst wall and mucosal epithelium of the stomach was seen in part of the inner aspect. Gastric duplication was consequently diagnosed. The gastric cancer had gone beyond the muscle layer and continuously invaded the duplicated stomach.
So far four domestic cases and three foreign cases of gastric duplication with malignant tumor have been reported as far as we could review. This is the first case in tumor around the stomach, we must make diagnosis by keeping the possibility of gastric duplication in mind, and remove it considering a possible association of malignancy.