Definition

A rare, inherited disorder that causes tumors to form in the oil glands in skin and in at least one internal organ. The skin tumors may be benign (not cancer) or malignant (cancer) and usually occur on the face, scalp, and eyelids. The internal tumors are malignant and usually form in the gastrointestinal tract (especially the colon and rectum) or genitourinary tract (endometrium and bladder). MTS is caused by mutations (changes) in the MLH1, MSH2, or MSH6 gene. MTS is a type of Lynch syndrome. Also called Muir-Torre syndrome.