Learn The Basics Squamous Cell Carcinoma of the Skin Squamous cells are small, flat skin cells in the outer layer of skin. When these cells become cancerous, they typically develop into flat or raised, rounded skin tumors. Sometimes the skin around the tumors gets red and swollen. Basal Cell Carcinoma Basal cell cancer is the most common form of skin cancer diagnosed in the United States. Basal cells are small, round skin cells normally found in the upper part of your skin. Kaposi's Sarcoma Kaposi's sarcoma is a type of cancer caused by the virus human herpes virus 8. The tumors appear as red or purple patches on the skin, mouth, lungs, liver, or gastrointestinal tract. Sun-Damaged Skin Although most people love the warmth and light of the sun, too much sun exposure can significantly damage human skin. Nonmelanoma Skin Cancers The two most common forms of nonmelanoma skin cancer are basal cell cancers, which account for 80% of all skin cancers, and squamous cell cancers, which account for 15% of cases. Melanoma Melanoma is cancer of the cells that give skin its color. Take Action Skin Cancer Additional Information Links to organizations that provide information about skin cancers. Protect Yourself From Environmental Risks Nine hundred thousand Americans are diagnosed with skin cancer each year, making it the most common form of cancer. Your Skin From Head To Toe Related Areas Cancer

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