Frequency of hereditary nonpolyposis colorectal cancer in southern Alberta.
The frequency of hereditary nonpolyposis colorectal cancer was evaluated in a group of colorectal cancer patients under age 50 diagnosed in southern Alberta between 1973 and 1987. Families were identified as positive for this syndrome if three first-degree relatives in the kindred had colorectal cancer. Of the 390 patients with adenocarcinoma, 318 patients participated. The frequency of hereditary nonpolyposis colorectal cancer was 3.1% (12 families) in this group (Ci95 1.6-5.3%). Clinical characteristics reported on from the index patients include tumor location, Dukes stage at presentation, frequency of synchronous and metachronous tumors, frequency of second primaries, and survival. The 5- and 10-year actuarial survival was 86% and 69%, respectively.
Department of Medicine, University of Calgary, Alberta, Canada.
P J
PJ
Westlake
H E
HE
Bryant
S A
SA
Huchcroft
L R
LR
Sutherland
D000230:Adenocarcinoma / Q000453:epidemiology; D000293:Adolescent; D000328:Adult; D000368:Aged; D000416:Alberta / Q000453:epidemiology; D001005:Anus Neoplasms / Q000453:epidemiology; D015179:Colorectal Neoplasms / Q000453:epidemiology* / Q000235:genetics / Q000401:mortality / Q000473:pathology; D005190:Family; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D016609:Neoplasms, Second Primary; D010375:Pedigree; D015996:Survival Rate