Colorectal Cancer Molecular Diagnostics
Sporadic colorectal cancer diagnosis now includes routine molecular diagnostic evaluation of eight potential genes to identify hereditary cancer and guide prognosis and therapy. These genes include those for the family of mismatch repair proteins: MLH1, MSH2, MSH6, and PMS2 and KRAS, BRAF, PIC3CA, and PTEN. The five known hereditary colon cancer syndromes involve germline alterations in the mismatch repair genes as well as six additional genes: APC, MUTYH, STK11, BMPR1A, SMAD4, and PTEN. These sporadic and hereditary tumors, along with currently available molecular testing approaches, will be discussed.
