Muir-Torre Syndrome Watchlist (log in to enable) Retrieved 2021-01-23 Source Orphanet Trials — Genes MLH1, MSH2, MSH6, FHIT, MRC1, MUTYH, MYH1, PMS2 Drugs — Interested in hearing about new therapies? Registered! Muir-Torre syndrome (MTS) is a form of hereditary nonpolyposis colon cancer (HNPCC) characterized by cutaneous sebaceous tumors, keratoacanthomas and at least one visceral malignancy, most frequently gastrointestinal carcinoma.