Basal-cell carcinoma results from chronic exposure to ultraviolet light. Those most at risk are fair-skinned, of Northern European descent, have freckled complexions, and have a history of repeated sun exposure. Basal-cell carcinoma can cause considerable damage and even disfigurement if it is not treated promptly. It can invade the skin and spread to underlying structures. However, it does not usually spread to other organs through the bloodstream like some cancers, and it usually grows slowly.
Early detection is the key to successful treatment.
If detected and treated early, there is a greater than 95 percent cure rate for basal-cell carcinoma. It is recommended that anyone who is exposed to the sun's rays for an extended period of time should wear a strong protective layer of sunscreen.