disease has location malignant gastric germ cell tumor extragonadal nonseminomatous germ cell tumor choriocarcinoma gastric choriocarcinoma GARD:0024337 MONDO:0006222 NCIT:C95749 A malignant germ cell tumor that arises from the stomach. It is characterized by the presence of syncytiotrophoblast and cytotrophoblast cellular components. It is often associated with lymph node and hematogenous metastases. UMLS:C2987398 gastric choriocarcinoma EFO:1000269 MEDGEN:459624 stomach