[Biological criteria for the surveillance of hydatidiform moles and choriocarcinomas].

Secretion of choriogonadotropin (hCG) remains until now the more accurate biochemical label of trophoblastic disease and a close follow-up is possible by means of sensitive and specific radioimmunoassays. After hydatidiform moles, drawing the decreasing curve of hCG concentrations by weekly measurements in plasma or urine, would generally allow distinguishing within a few weeks cases with and without retention of active trophoblastic tissue, although in only 30 p. 100 of moles hCG spontaneously disappears within a month. In some choriocarcinoma under therapy, low persisting hCG levels (lower than 100 or 50 I.U./24 hours) could only be evidenced by repeated radioimmunoassays. Even with apparently physiological hLH/hCG concentrations, the use of anti-beta hCG antiserum could demonstrate, if any, a secretion of choriogonadotropin. In castrated women the same technique would elude the interference of hLH and make easier the diagnostic of relapses.