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Skin cancer is a malignant tumor that grows in the skin cells and accounts for 50 percent of all cancers. Sun exposure is a critical factor in the cause of skin cancers. Most skin cancers appear later in life, but sun damage begins at an early age.

Types of Skin Cancer

Basal Cell Carcinoma

Accounts for approximately 80 percent of all skin cancers. This highly treatable cancer starts in the basal cell layer of the epidermis (the top layer of skin) and grows very slowly. Basal cell carcinoma usually appears as a small, shiny bump or nodule on the skin – mainly those areas exposed to the sun, such as the head, neck, arms, hands and face. It commonly occurs among persons with light-colored eyes, hair, and complexion.

Squamous Cell Carcinoma

Although more aggressive than basal cell carcinoma, is highly treatable. It accounts for about 20 percent of all skin cancers. Squamous cell carcinoma may appear as nodules or red, scaly patches of skin, and may be found on sun-exposed areas such as the face, ears, lips, and mouth. However, if left untreated, squamous cell carcinoma can spread to other parts of the body. This type of skin cancer is usually found in fair-skinned people.

Malignant Melanoma

Accounts for a small percentage of all skin cancers, but accounts for most deaths from skin cancer. Malignant melanoma starts in the melanocytes, cells that produce pigment in the skin. Malignant melanomas sometimes begin as an abnormal mole that then turns cancerous. This cancer may spread quickly. Malignant melanoma most often appears on fair-skinned men and women, but persons with all skin types may be affected.

Skin Cancer Treatments