[Primary-multiple malignant tumors of the colon, uterus and breast].

A study of 94 case histories of primary multiple tumors of the large bowel, uterus and breast showed relative risk of development of uterine body cancer in patients with colonic cancer to be 37 times that for a general population of healthy females over 40 years of age. Post-treatment risk of breast cancer in cases of large bowel cancer increases 17-fold, uterine body--15-fold and cervix uteri--10-fold. Risk for large bowel cancer increases 179-fold in patients treated for uterine body tumors. On the whole, it serves as a confirmation of a possible role of endocrine-metabolic disorders played in the pathogenesis of primary multiple tumors of the large bowel and uterus. Radiation is the key factor of induction of rectal and rectosigmoidal tumors as a result of radiotherapy for cancer of the uterus. The results of the study make the case for timely diagnosis of primary multiple tumors of the large bowel, uterus and breast and adequate follow-up, no matter at what site the first tumor was found.