Abstract
A male infant was born with a birth weight of 3,697 g at 38 weeks and 4 days of gestation. An antenatal ultrasound revealed a solid mass in his left abdomen close to the stomach at 36 weeks of gestation. Postnatal CT and MRI demonstrated a calcified tumor immediately below his cardia. An upper GI series showed an extramural projection at the fundus. Results of these examinations suggested the presence of gastric teratoma. The tumor enlarged rapidly from 28 mm in diameter at 36 weeks of gestation to 40 mm at birth and 78 mm at the time of operation. The tumor was resected by laparotomy at the age of 16 days. This case suggested that gastric teratoma diagnosed antenatally may grow rapidly and require early surgery.
