CAT25 is a mononucleotide marker to identify HNPCC patients.

Mismatch repair mutations are the cause of generalized genomic instability and are particularly evident at microsatellite loci, which is known as microsatellite instability (MSI). MSI is present in 85% to 90% of colorectal cancers and occurs in hereditary non-polyposis colorectal cancer (HNPCC). The National Cancer Institute recommends the "Bethesda panel" for MSI screening.

MSH2 missense mutations and HNPCC syndrome: pathogenicity assessment in a human expression system.

Hereditary Non-Polyposis Colorectal Cancer (HNPCC) is associated with germline mutations in one of several MisMatch Repair (MMR) genes. An increasing proportion (20-25%) of the reported MSH2 variants consists of single amino-acid substitution with uncertain disease-causing significance. The present study was undertaken to functionally characterize 3 MSH2 nontruncating variants: p.

KIT and PDGFRalpha mutations in 104 patients with gastrointestinal stromal tumors (GISTs): a population-based study.

Background: The prognostic significance of KIT or platelet-derived growth factor receptor alpha (PDGFRalpha) mutations in gastrointestinal stromal tumors (GISTs) is still controversial.

Patients And Methods: In all, 104 patients were diagnosed with GISTs by KIT immunoreactivity; tumor DNA was sequenced for the presence of mutations in KIT exons 9, 11, 13 and 17 and in PDGFRalpha exons 12 and 18. Disease-free survival (DFS) was analyzed in 85 radically resected patients.

Effectiveness of the CRCAPRO program in identifying patients suspected for HNPCC.

Subjects affected by hereditary non-polyposis colorectal cancer exhibit a high susceptibility to colon and extracolonic tumours, due to MMR gene defects. Revised Bethesda criteria are used to select patients as candidates for genetic tests. Recently, the CRCAPRO model has been developed, based on family history of colorectal and endometrial cancers.