Survival of patients with Stage III colon cancer is improved in hereditary non-polyposis colorectal cancer compared with sporadic cases. A Danish registry based study

L M Brixen, I T Bernstein, S Bülow, E Ehrnrooth
Colorectal Disease 2013, 15 (7): 816-23

AIM: Patients with hereditary non-polyposis colorectal cancer (HNPCC) seem to have a better prognosis than those with sporadic colorectal cancer (CRC). The aim was to compare survival after Stage III CC in patients with HNPCC with those having sporadic CC.

METHOD: A total of 230 patients with hereditary cancer from the Danish HNPCC Register and 3557 patients with sporadic CC from the Danish Colorectal Cancer Database, diagnosed during May 2001-December 2008, were included. HNPCC patients were classified according to mismatch repair mutation status and family pedigree. Sporadic cases had no known family history of cancer. Patient characteristics, geographical differences and survival data were analysed.

RESULTS: The overall survival (OS) was better in HNPCC patients compared with sporadic CC after stratification for sex and age (P = 0.02; CI 1.04-1.7). The 5-year survival was 70% in HNPCC patients compared with 56% in sporadic CC (P < 0.001). No survival difference was found between HNPCC subgroups but a tendency to better OS was seen in patients with Lynch syndrome. No geographical differences in OS were found. The median follow-up was 3.9 (0-9.5) years for HNPCC vs 3.2 (0-9.6) years for sporadic CC.

CONCLUSION: HNPCC patients with Stage III CC have a better OS compared with sporadic CC. No significant difference in OS was found within HNPCC subgroups.

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