Inherited association of breast and colorectal cancer: limited role of CHEK2 compared with high-penetrance genes.

Abstract:

:We assessed the association between breast cancer (BC) and colorectal cancer (CRC) from referral pattern to the Regional Genetics Service including molecular analysis. Hospital computer records and/or department referral books were used to identify cases referred to the Regional Genetic Service during a 16-year period (1990-2005 inclusive). All files were reviewed along with associated demographic data, risk assessments, referral details and results from mutation testing. Families were assessed for hereditary breast and colorectal cancer (HBCC) criteria, and all families with eligible individuals were tested for the 1100delC mutation in CHEK2. A total of 8,612 families were identified. One hundred and sixteen of 1,631 (7.5%) families with a primary referral for CRC fulfilled the criteria for HBCC, whereas only 68/6981 (1%) BC referrals fulfilled these criteria. Blood samples were obtained from 113 individuals from 83/184 families. Only 1/113 (1%) has screened positive for the CHEK2 mutation, whereas 14 (17%) families segregate BRCA1/2 mutations and at least 7 (8.5%) carry MLH1/MSH2 mutations. HBCC syndrome, if it exists as a separate entity, is not likely to be due to CHEK2 mutations. Many families are explicable by existing high-penetrance genes, and further work is necessary to elucidate whether the remainder is due to chance or as yet undiscovered genes.

journal_name

Clin Genet

journal_title

Clinical genetics

authors

Naseem H,Boylan J,Speake D,Leask K,Shenton A,Lalloo F,Hill J,Trump D,Evans DG

doi

10.1111/j.1399-0004.2006.00698.x

subject

Has Abstract

pub_date

2006-11-01 00:00:00

pages

388-95

issue

5

eissn

0009-9163

issn

1399-0004

pii

CGE698

journal_volume

70

pub_type

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