“…These data provide relative risk estimates for individuals with first-, second-, or third-degree relatives affected, and fiirther characterize risk based on age of onset and whedier disease was bilateral (Macklin, 1959;Anderson, 1971;1976;Brinton et al, 1979;1982;Sattin et al, 1985;Ottman et al, 1986;Tulinius et al, 1992;Slatteiy et al, 1993;Carter et al, 1989;Colditz et al, 1993). While population-derived data are fiilly appropriate for risk counseling for polygenic disorders, it has been recognized that such counseling will underestimate the risk in hereditary syndromes, and overestimate the risk in "sporadic" cases (Knell, 1993). This has led to the development of multidisciplinary genetic counseling approaches for common adult malignancies which integrate empiric, Mendelian, and Bayesian methods of risk estimation (Offit and Brown, 1994).…”