Interpretation of Genetic Test Results for Hereditary Nonpolyposis Colorectal Cancer

Interpretation of genetic test results for hereditary nonpolyposis colorectal cancer: implications for clinical predisposition testing.

CONTEXT Genetic testing for cancer predisposition is evolving from purely research applications to affecting clinical management. OBJECTIVE To determine how often genetic test results for hereditary nonpolyposis colorectal cancer (HNPCC) can be definitively interpreted and used to guide clinical management. DESIGN Case-series study conducted in 1996 to 1998 in which a complete sequence anal...

Genetic counseling in hereditary nonpolyposis colorectal cancer.

Recent identification of gene mutations responsible for hereditary nonpolyposis colorectal cancer (HNPCC) has made possible the presymptomatic diagnosis of at-risk family members. If DNA testing shows that a family member is a gene carrier, that individual's lifetime cancer risk is approximately 90%. If the test is negative, the family member's cancer risk drops to that of the general populatio...

Psychological Impact and Associated Factors After Disclosure of Genetic Test Results Concerning Hereditary Nonpolyposis Colorectal Cancer

Hereditary nonpolyposis colorectal cancer.

Hereditary nonpolyposis colorectal cancer (HNPCC), or Lynch syndrome, is the most common form of hereditary colorectal cancer (CRC). A well-orchestrated cancer family history is essential for its diagnosis since, unlike its familial adenomatous polyposis (FAP) hereditary cancer counterpart, HNPCC lacks distinguishing clinical stigmata of its cancer genetic risk. Discoveries in the 1990s of germ...

Diagnostic microarray test for a genetic predisposition to hereditary nonpolyposis colorectal cancer (HNPCC)

Colorectal cancer (CC), due to its frequency and social costs is a subject of extensive screening programs (colonoscopy and new developments) in several countries, including Poland. Relatively common and defined genetic predispositions to different forms of CC make genetic screening an attractive alternative, not only in families with positive CC history. Optimal testing strategy should be acce...