A31-year-old patient presented with abdominal pain, hematemesis, and melena. Digestive endoscopy demonstrated a tumor in the lesser curvature. Computed tomography scan demonstrated an expansive, solid, and cystic mass, with central and intramural calcifications, located in the epigastrium, in close contact with the wall of the lesser curvature (Figure A). The patient developed acute anemia and underwent emergency surgery. The pathology report showed a giant gastric tumor measuring (12 X 8 X5 cm). On serial sectioning, cystic and solid areas with mucinous material, adipose tissue, and scattered hairs (arrows) were identified (Figure B). Histopathology revealed several welldifferentiated tissues derived from the germ layers, adipose tissue and skin with its appendages (Figure C). The Ki-67 was reactive in the basal layer of the squamous epithelium (Figure D). No malignancy was found in the tumor.
The patient had an uneventful postoperative course during the rest of his hospital stay and was discharged on Day 17 Gastric teratomas are very unusual tumors. The cases reported in the literature correspond to teratomas in newborns or pediatric patients but we present an extremely rare case of gastric mature teratoma in an adult. We recommend clinical follow-up including afetoprotein and b-human chorionic gonadotropin measurements.