|Basal Cell Carcinoma (BCC)||Squamous Cell Carcinoma (SCC)||Melanoma|
|Small, shiny bumps or nodules that are red, pink, or white; persistent, nonhealing sore; reddish flat patch; or a scar-like white or yellowish area||Red, scaly patches or bumps||Asymmetrical, mottled patches with notched or blurred borders, typically in tan, brown, or black|
|Size||Takes many years or months to reach a half-inch||Can reach up to three-quarters of an inch to an inch||Usually greater than 6 mm|
|Location||Head, neck, hands, and occasionally on the trunk of the body||Face, ears, neck, lips, and back of the hands||Can occur anywhere on the body, most frequently on the upper back or legs, as well as the head and neck|
|Progression||Grows slowly and may bleed, crust over, then the cycle repeats||Can develop into large masses||Can appear without warning, or may begin in or near a mole or other dark spot on the skin|
|Potential for metastasis||Rare, but can grow into nearby areas and may invade bone and vital structures, such as the eye||Can metastasize, and may be fatal if not treated||Can metastasize, and is deadly if not treated|
|Prevalence||BCC accounts for 80% of all skin cancers (more than 800,000 new cases each year).||SCC accounts for 16% of all skin cancers (approximately 250,000 new cases each year). About 2,500 deaths from SCC are expected during 2007.||Melanoma accounts for 4% of all skin cancers (approximately 59,940 new cases each year). More than 8,110 melanoma deaths are expected during 2007.|
Adapted, with permission, from the American Academy of Dermatology’s “Actinic Keratoses and Skin Cancer,” available at http://www.aad.org/public/News/DermInfo/DInfoSkinCancerUpdates.htm.