[Role of genealogical studies for the prevention of malignant neoplasms].

Based on clinico-genealogical studies of 219 cancer patients, whose relatives suffered neoplastic processes, it was concluded that a hereditory factor plays a definite role in cancer morbidity. It seems to be rational to single out the relatives of the proband as a high-risk group in malignant tumor morbidity and to keep them under a dispensary control.