Gastric teratoma is a very rare benign tumor. Only 36 cases have previously been reported in the Japanese liturature. Here we reported a case of 47 day-old male infant with a huge gastric teratoma causing acute respiratory distress. Upon surgery, an intraabdominal huge capsulated mass arising from the greater curvature of posterior gastric wall was found. The tumor which was exstirpated combined with gastrectomy (tubular resection by Connell technique) was measured 17 X12 X 12cm and weighed 900g. Histological diagnosis was benign teratoma including immature neural tissue cells. Two years after surgery, he was healthy and symptomless. Clinical presentation, diagnosis and surgical treatment of the gastric teratoma were discussed briefly with relevant literatures.
