Two Cases of Enterogenous Cyst of the Stomach

Two cases of enterogenous cyst of the stomach are reported. Case 1. A 50-year-old man was admitted because of black stool. X-ray and endoscopic examination revealed not only gastric carcinoma of Borrmann II type but also submucosal tumor measuring 2.9cm in diameter. Total gastrectomy was performed and histological examination revealed the submucosal tumor to be a cyst within submucosal layer of the stomach. The wall of the cyst was composed of enteric mucosa and surrounding smooth muscle layer. Case 2. A 63-year-old man was admitted because of a relapse of chronic alcoholic liver disease. X-ray examination of upper alimentary tract showed a submucosal tumor measuring 3.0 X 2.2cm in size of the stomach incidentally. Because operative findings revealed the submucosal tumor to be a intramural cyst, enucleation of the cyst was performed. It contained mucus and its wall was composed of gastric mucosa and surrounding smooth muscle layer. Enterogenous cyst of the stomach is uncommonly experienced as submucosal tumor. It is difficult to differentiate the submucosal cystic lesions from another submucosal solid tumors such as myogenous tumor or aberrant pancreas. If exact diagnosis is made by the technique for biopsy of common submucosal tumors, it is alternative to follow-up the patient except for major symptom or complication.