Squamous Cell Carcinoma originates in the top layers of the epidermis. Causes are lifetime exposure to the sun. Can be prevented by wearing sunscreen and a hat. Once Squamous Cell Carcinoma has formed it can be treated with surgery in its early stages when it's still contained. If left untreated the cancer cells can spread to deeper layers in the epidermis and other parts of the body. In these cases radiation therapy may become necessary.
Melanoma can be prevented by things like putting on sunscreen, wearing a hat, and avoiding tan beds. Melanoma originates in the Melanocytes when they become mutated, and start dividing out of control and even spreading to other parts of the body. Melanoma can be sometimes be diagnosed by looking at the skin, but the only way to know for sure is a biopsy. It can be treated with radiation, surgery, medications like antivirals, and chemotherapy.
Basal Cell Carcinoma originates in the Stratum Basal, the lowest part of the epidermis. The best way to diagnose Basal Cell Carcinoma is a skin biopsy. If the cancer cell is contained in one area then it can be surgically removed. Basal Cell Carcinoma is prevented by wearing sunscreen, hats, and long clothes.