[The medical genetic approach in the diagnosis of cancer]

Formation of registers of families afflicted by tumors of certain sites and dynamic follow-up of "healthy" members of such families is a new approach to early diagnosis and prevention of cancer. The results of a clinico-genetic study of hormone-dependent tumors of the female genitals and breast served as a basis for the development of a pattern of medico-genetic follow-up which, in turn, may facilitate integration of the above method with treatment for cancer of said and other sites.