Carcinoma colorrectal con alteración de la vía reparadora. Claves para su identificación y relevancia clínica

Colorectal carcinoma (CRC) in Spain shows mismatchrepair deficiency (MMR+) reaching a 7.5%. Twenty percent of them presents in Lynch syndrome. Identification of these patients is based on clinical, molecular, histopathologic and immunohistochemical criteria. Immunohistochemical analysis of mismatch-repair proteins (MLH1, MSH2, MSH6, and PMS2) is a valid technique to detect MMR+ tumors. The generalized use of immunohistochemistry confers to pathologists a fundamental role in the identification of patients with Lynch syndrome.