Is this the right move if they cannot tell him he definitely has Muir-Torre?

Muir-Torre syndrome is an alternative form (variant) of hereditary non-polyposis colorectal cancer (HNPCC).Cancer begins when normal cells begin to change and grow uncontrollably, forming a mass called a tumor. A tumor can be benign (noncancerous) or malignant (cancerous, meaning it can spread to other parts of the body). People with Muir-Torre syndrome have an increased risk of the types of cancer seen in HNPCC, including colorectal, endometrial (uterine), stomach, ovarian, small bowel (intestinal), urinary tract, and hepatobiliary (liver or bile duct) cancers.

People with Muir-Torre syndrome are also at risk for developing certain skin changes in adulthood that may form in the sebaceous glands. The sebaceous glands are located just under the skin and produce an oily substance called sebum that is a part of sweat. The typical skin changes found in Muir-Torre syndrome are sebaceous adenomas, sebaceous epitheliomas, sebaceous carcinomas, and keratocanthomas. Most of these skin conditions are associated with noncancerous lumps on the skin, some of which are liquid-containing cysts. Basal cell carcinoma, a common type of skin cancer usually related to sun exposure, has also been reported in people with Muir-Torre syndrome. Only the skin carcinomas are cancerous. Muir-Torre syndrome is also associated with rare cancers of the sebaceous glands. If a cancer of the sebaceous gland is diagnosed, it is recommended that the patient talk with a genetic counselor or geneticist (a doctor with training in genetic diseases and conditions) that is familiar with the syndrome is recommended.

Muir-Torre syndrome is a genetic condition. This means that the cancer risk can be passed from generation to generation in a family. Two genes have been linked to Muir-Torre syndrome, MLH1 and MSH2. A mutation (alteration) in either of these genes gives a person an increased lifetime risk of developing the types of cancer or benign skin changes listed above. Mutations in the MLH1 or MSH2 ge