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...

hereditary nonpolyposis colorectal cancer in northeastern iran

background: there are no data on familial aggregation of colorectal cancer (crc) in northeastern iran. the aim of this study was to determine the prevalence of early-onset crc and patients suspected for hereditary non-polyposis colorectal cancer (hnpcc) based on the clinical criteria in this area. materials and methods: documents were collected from two hospitals in mashhad regarding 326 inpati...

Genetics of hereditary nonpolyposis colorectal cancer.

Colorectal cancer is a major cause of morbidity and mortality. About 15 - 20% of all colorectal cancers are familial. Hereditary nonpolyposis colorectal cancer is an inherited cancer predisposition syndrome. It is caused by mutations in mismatch repair genes, predominantly MSH2 and MLH1. Although hereditary nonpolyposis colorectal cancer accounts for a minority of colorectal cancers, the mutati...

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...

Surveillance in Hereditary Nonpolyposis Colorectal Cancer Syndrome