Skin cancer is a serious and sometimes fatal disease. Healthy skin cells become unable to reproduce as they normally would to replace dead skin cells. This is how skin cancer is defined. A tumor on a skin cancer patient is a mass of dead skin cells that cannot reproduce. The skin is the largest organ on the human body.

Signs of skin cancer specifically can come from age. Majority of skin cancers tend to be basal cell carcinoma. These are non spreading skin cancers. There are three different kinds of skin cancers. Basal cell carcinoma is the least dangerous form of skin cancer. Another form of skin cancer is called squamous cell carcinoma.