Immunobiology of molar pregnancy and gestational trophoblastic tumors.

Because all the chromosomes in complete molar pregnancy are of paternal origin, complete moles are complete allografts (transplants). Complete moles may therefore be expected to induce a vigorous maternal host immunologic response. Further understanding of the relationships between the normal placenta, mole and choriocarcinoma may provide important insights into the basic mechanisms of teratogenesis and carcinogenesis.