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Basal cell carcinoma is the most common form of skin cancer, and squamous cell carcinoma is the second most common type of skin malignancy. Although the two types of skin cancer are the most common of all malignancies, they account for less than 0.1% of patient deaths caused by cancer. Both of these types of skin cancer are more likely to occur in individuals of light complexion who have had significant exposure to sunlight, and both types of skin cancer are more common in the southern latitudes of the Northern hemisphere.
The overall cure rate for basal cell carcinoma and squamous cell carcinoma is directly related to the stage of the disease and the type of treatment used. Since neither basal cell carcinoma nor squamous cell carcinoma are reportable diseases, precise 5-year cure rates are not known.
Although basal cell carcinoma and squamous cell carcinoma are by far the most frequent types of skin tumors, the skin can also be the site of a large variety of malignant neoplasms. Other types of malignant disease include malignant melanoma, cutaneous T-cell lymphomas (e.g., mycosis fungoides), Kaposi sarcoma, extramammary Paget disease, apocrine carcinoma of the skin, and metastatic malignancies from various primary sites.
Source: National Cancer Institute