The Human Chorionic Gonadotropin (hCG)
antibody reacts with a protein that is secreted by normal trophoblasts in normal
placenta and in neoplastic trophoblasts of choriocarcinomas and teratomas.
It has also been shown to react with lung cancer, urinary bladder, ovarian mixed
germ- cell tumors, adenocarcinoma of the prostate, seminomas and pituitary
adenomas.