Basal cell carcinoma (BCC), the most common form of skin cancer, forms in the lowest layer of the epidermis of skin. The cancer rarely spreads (metastasize). But it can invade the surrounding tissues and cause significant damage and disfigurement.
Causes
The main cause is long term exposure to ultraviolet radiation from the sun. Genetics and light-coloured skin are the risk factors. Indoor tanning beds can also significantly increase chances of cancer. People with basal cell nevus syndrome (Gorlin syndrome) are prone to developing BCC.
Symptoms
The cancer appears as red patches, open sores, scar tissue or shiny, pearly nodules. Though it does not metastasize, it can grow and infiltrate vital structures around it and cause disfigurement.