A Case of Extragastic Developing Type Carcinoma of the Stomach with Cyst Formation

Abstract

A rare case of extragastric developing type carcinoma of the stomach with cyst formation is reported. A 74-year-old male complaining of dyspnea and general fatigue was admitted in May 1988. Upper gastrointestinal tract barium contrast study revealed a protruding lesion at the greater curvature of the antrum. This lesion looked like a submucosal tumor. The biopsy specimens revealed adenocarcinoma and subtotal gastrectomy was performed. Macroscopically, the serosal surface of the resected specimen showed an extragastric developing and round nodule measuring 7×5 cm. The cut surface revealed variously sized multiple cysts beneath the mucos-al layer up to the serosa. Microscopic examination revealed proliferation of cystic structures composed of collumar epithelium and, in some areas, tubular or papillary proliferation. The metastatic lymph node showed the same findings. It is suggested that this is a rare case of extragastric developing type carcinoma of the stomach with cyst formation.