- Patients accepted for referral to the Cancer Family Clinic of the Department of Medicine at Memorial Sloan-Kettering Cancer Center are eligible for participation in this study. Such patients should have a history of cancers of the breast, ovary, colon, prostate, uterus, non-Hodgkin's lymphoma, leukemia, soft tissue sarcoma, endocrine neoplasms, or other malignancies presenting in first degree relatives or in successive generations as part of a suspected cancer family syndrome.