[Paraneoplastic precocious puberty in a child. Mediastinal teratoma with chorionic gonadotropin secretion]

A case of precocious puberty in a 5-years old boy with a rapid increase of androgens, small testes, a high level of urinary bioassayable gonadotrophins, but no response of pituitary gonadotrophins of LH-RH injection. The cause was a mediastinal teratoma secreting chorionic gonadotrophin (HCG and beta subunit).