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Skin Cancer, Childhood |
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Skin Cancer (Melanoma, Basal Cell Carcinoma, Squamous Cell Carcinoma) Melanoma is thought to be the most common skin cancer in children, followed by basal cell and squamous cell carcinomas. The incidence of melanoma in children and adolescents represents approximately 1% of the new cases of melanoma that are diagnosed annually in the United States. In all instances, melanoma in the pediatric population is similar to that of adults in relation to site of presentation, symptoms, description, spread, and prognosis, but may grow faster in children than in adults. The most common cause of skin cancer of any type is exposure to the ultraviolet (UV) portion of sunlight. Other causes may be related to chemical carcinogenesis, radiation exposure, immunodeficiency, or immunosuppression. The person who is most likely to develop a melanoma is easily sunburned, has poor tanning ability, and generally has light hair, blue eyes, and pale skin. Worldwide, there is an increasing incidence of both melanoma and nonmelanoma skin cancers. Melanoma presents as a relatively flat, dark-colored lesion that may enlarge, penetrate the skin, or metastasize. Melanomas may be congenital (present at birth). They are sometimes associated with large congenital black spots known as melanocytic nevi, which may cover the trunk and thigh. Children with hereditary immunodeficiencies have an increased lifetime risk of developing melanoma. Individuals with atypical moles, which include raised lesions (that may or may not bleed) and various color hues (brown, tan, pink, black) are at an increased risk of having melanoma and having children affected by these premalignant lesions. Basal cell carcinoma generally appears as a raised lump or ulcerated lesion, usually in areas with previous sun exposure. Squamous cell carcinomas are usually reddened lesions with varying degrees of scaling or crusting; they have an appearance similar to eczema, infections, trauma, or psoriasis. Basal and squamous cell carcinomas are generally curable with surgery alone, but the treatment of melanoma requires greater consideration because of its potential for metastasis. Surgery for melanoma depends on the size, site, level of invasion, and metastatic extent or stage of the tumor. If the melanoma has not spread beyond the lymph nodes, adjuvant biologic therapy may be given to increase the chances of a cure. If the melanoma has spread beyond the lymph nodes, treatment may include a combination of chemotherapy and biologic therapy. There are clinical trials for melanoma available to children aged 10 years or older. Information about ongoing clinical trials is available from the NCI Web site.
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