If you are in a high-risk group for skin cancer or have ever been treated for some form of the disease, you should familiarize yourself with how skin cancers look. Examine your skin from head to toe every few months, using a full-length mirror and hand mirror to check your mouth, nose, scalp, palms, soles, backs of ears, genital area, and between the buttocks. Cover every inch of skin and pay special attention to moles and sites of previous skin cancer. If you find a suspicious growth, have it examined by your dermatologist.
Skin cancer is a disease in which malignant (cancer) cells form in the tissues of the skin.
The skin is the body's largest organ. It protects against heat, sunlight, injury, and infection. Skin also helps control body temperature and stores water, fat, and vitamin D. The skin has several layers, but the two main layers are the epidermis (upper or outer layer) and the dermis (lower or inner layer).
The epidermis is made up of 3 kinds of cells:
Squamous cells are the thin, flat cells that...
Any change in size, color, shape, or texture of a mole or other skin growth
An open or inflamed skin wound that won't heal
Melanoma, the most dangerous type of skin cancer, may appear as:
A change in an existing mole
A small, dark, multicolored spot with irregular borders -- either elevated or flat -- that may bleed and form a scab
A cluster of shiny, firm, dark bumps
A mole larger than a pencil eraser
An easy way to remember the signs of melanoma is the ABCDEs of melanoma: Asymmetry, irregular Borders, changes in Color, Diameter larger than a pencil eraser, Evolution of a mole's characteristics, be it size, shape, color, elevation, bleeding, itching, or crusting.
Basal cell carcinoma may appear on sun-exposed skin as:
A pearly or flesh-colored oval bump with a rolled border, which may develop into a bleeding ulcer
A smooth red spot indented in the center
A reddish, brown, or bluish black patch of skin on the chest or back
Squamous cell carcinoma may appear on sun-exposed skin as:
A firm, reddish, wart-like bump that grows gradually
A flat spot that becomes a bleeding sore that won't heal
Call Your Doctor About Skin Cancer If:
An existing mole changes size, shape, color, or texture; or you develop a very noticeable new mole as an adult
A new skin growth or open sore does not heal or disappear in 6 weeks