Trophoblastic tumor Abnormal placenta morphology Choriocarcinoma 2011-06-07T11:05:40Z A malignant, trophoblastic and aggressive cancer, usually of the placenta. It is characterized by early hematogenous spread to the lungs and belongs to the far end of the spectrum of gestational trophoblastic disease (GTD), a subset of germ cell tumors. SNOMEDCT_US:188188009 UMLS:C0008497 SNOMEDCT_US:44769000 HP:0100768