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(basal-cell carcinoma, skin carcinoid), a skin tumor originating in the basal layer of the epidermis or cutaneous appendages. Basalomas are usually single and are found on the face, less commonly on the extremities or trunk. They may grow for years. They generally appear in middle or old age. A variety of basaloma is flat surface basaloma of the skin, which is found on persons of both sexes, usually those over age 40. It takes the form of pinkish plaques of different sizes, with separate scales and bloody crusts on the surface; the plaques are found on the trunk, less commonly on the face. A basaloma is benign. Treatment includes X-ray therapy, electrocoagulation, and surgical removal.