- A raised red patch that is scaly or rough
- A raised patch of skin that may appear to have horn-like rough edges
- In color, the patch may be reddish, pink, flesh-colored, or reddish-brown
- Poorly defined outline, with some satellite growths
- A long-standing sore that will not heal with simple at-home treatment
The diagnosis will probably be made by a doctor who specializes in skin care, called a dermatologist. The dermatologist will look at the skin growth and take a sample, called a biopsy , to test for cancerous cells. The doctor will then decide on a treatment plan based on the size, growth, subtype, and location of the tumor.