title: Evaluation of familial clustering of breast and prostate cancer in the Minnesota Breast Cancer Family Study.
abstract: Few studies examining familial clustering of breast and prostate cancer (PC) have focused on a clearly defined high-risk population with epidemiologic risk factors. We conducted a cohort study of prostate cancer among a subset of 426 families ascertained through female breast cancer probands. Three groups of males were included: 804 relatives in 60 families with four or more breast or ovarian cancers, 536 marry-ins in these high-risk families, and 484 relatives in 81 families where only the proband had breast cancer. A total of 118 prostate cancers were reported. The rate of prostate cancer among blood relatives in high-risk families was significantly lower than among marry-ins (RR = 0.6, 95% C.I.: 0.4-0.9). The rate of prostate cancer among blood relatives in low-risk families was not significantly different from the rate among marry-ins (RR = 0.8, 95% C.I.: 0.5-1.2). These results provide little evidence that male relatives in high-risk breast cancer families are at increased risk of prostate cancer.
authors.affiliation: Department of Health Sciences Research, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA.
authors.forename: Dawn M
authors.initials: DM
authors.lastname: Grabrick
authors.forename: James R
authors.initials: JR
authors.lastname: Cerhan
authors.forename: Robert A
authors.initials: RA
authors.lastname: Vierkant
authors.forename: Terry M
authors.initials: TM
authors.lastname: Therneau
authors.forename: John C
authors.initials: JC
authors.lastname: Cheville
authors.forename: Donald J
authors.initials: DJ
authors.lastname: Tindall
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Sellers
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000453:epidemiology / Q000235:genetics*; D016000:Cluster Analysis; D015331:Cohort Studies; D016021:Epidemiologic Studies; D005260:Female; D020022:Genetic Predisposition to Disease; D006306:Health Surveys; D006801:Humans; D008297:Male; D008403:Mass Screening; D008910:Minnesota; D010051:Ovarian Neoplasms / Q000453:epidemiology / Q000235:genetics; D015995:Prevalence; D011471:Prostatic Neoplasms / Q000453:epidemiology / Q000235:genetics*; D012307:Risk Factors