Familial prostate and breast cancer in men treated with prostatectomy for prostate cancer: a population based case-control study.
OBJECTIVE
We assessed familial prostate and breast cancer in Quebec.


METHODS
Using a self-administered mail survey we assessed the prevalence of prostate and breast cancer in first degree relatives of 1,633 men treated with prostatectomy for prostate cancer in the province of Quebec and in first degree relatives of 1,386 spouse controls.


RESULTS
The OR of familial breast cancer was 1.1 (95% CI 0.9 to 1.4). The OR of 3.0 (95% CI 2.5 to 3.6) recorded for prostate cancer was modified by francophone versus anglophone linguistic preference (OR 3.2, 95% CI 2.6, 3.9 versus 1.5, 95% CI 0.8 to 2.7, p = 0.02). Male sibship size was a statistically significant parameter modifying this association (p = 0.02), namely no brothers (OR 1.7, 95% CI 1.0 to 2.8), 1 or 2 (OR 3.1, 95% CI 2.2 to 4.3) and 3 or more (OR 3.9, 95% CI 2.9 to 5.2). Geographic regions of the province including and neighboring greater Montreal showed a lower OR than more peripheral regions (2.5, 95% CI 2.0 to 3.2 versus 4.1, 95% CI 2.9 to 5.7, p = 0.02).


CONCLUSIONS
Francophone men with large male sibships residing in remote areas may be at higher risk for familial prostate cancer and represent the ideal target for further efforts to determine the genetic component of prostate cancer in Quebec.
Karakiewicz
Pierre I
PI
Department of Surgery (Urology), McGill University, 1650 Cedar Avenue, Montreal, Quebec, Canada H3G 1A41.
Foulkes
William
W
Tanguay
Simon
S
Elhilali
Mostafa  M
M
Aprikian
Armen G
AG
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000453:epidemiology / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D015995:Prevalence; D011468:Prostatectomy; D011471:Prostatic Neoplasms / Q000453:epidemiology / Q000235:genetics* / Q000601:surgery; D011792:Quebec / Q000453:epidemiology; D012307:Risk Factors; D035781:Siblings; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires