Basal cell carcinoma.

Fair-skinned persons who have had significant exposure to the sun are at greatest risk for basal cell carcinoma. Clinically, basal cell carcinomas include numerous nodular and flat types. The lesions of basal cell carcinoma are usually asymptomatic until enlargement, bleeding or invasion of underlying tissue occurs. Metastasis is rare. A biopsy should be obtained before destructive treatment is carried out. Surgical excision, curettage and electrodesiccation or cryosurgery are acceptable procedures for removal of most lesions. Periodic follow-up is necessary to screen for new or recurrent skin cancer.