Noncancerous, Precancerous and Cancerous Tumors

There are many uncommon types of skin cancer. Kaposi sarcoma appears as reddish or brownish discolorations on the skin or inside the mouth. The cancer occurs in people who have a weakened immune system. Merkel cell carcinoma is a skin cancer that usually appears on sun-exposed areas of the face, neck, arms, and legs. It can spread to other areas if it is not caught early. Sebaceous gland cancer develops in oil glands in the skin. It may appear as a growth on the upper or lower eyelids. As with many cancers, sebaceous gland cancer can be treated successfully when it is diagnosed and treated early.