Frequency of disease |
2nd most common skin cancer |
Most common skin cancer in Blacks; 2nd most common in Hispanics, Asians |
Risk factors |
Sun exposure, fair skin, immunosuppression, human papillomavirus infections, scarring |
Chronic scarring/inflammation from burns, leg ulcers, radiation, lupus, immunosuppression, human papillomavirus |
Typical clinical presentation |
Superficial lesion arising from indurated, rounded, elevated base |
Sore that will not heal(bleeding or developing a crust) |
Anatomic distribution |
Sun exposed areas (head and neck, hands) |
Skin infrequently exposed to the sun (legs) |