Skin cancer is the most common type of cancer to affect the human body. In the United States alone, one million people each year are diagnosed with some form of skin cancer.
The best way to think about skin cancers are melanoma versus non-melanoma. The most common type of skin cancer in the United State is non-melanoma skin cancers, specifically basal cell carcinoma. These are cancers that grow locally on sun exposed areas and do not metastasize. They're easily treated with excision.
The second most common type is squamous cell carcinoma of the skin. Similar to basal cell carcinoma, they appear on sun exposed areas. They oftentimes do not metastasize until very late in the game and oftentimes can be treated with excision. Melanoma accounts for only four percent of total skin cancers diagnosed each year. However, it's the deadliest.
Seventy-three percent of all skin cancer-related deaths are due to melanoma. And melanoma accounts for the sixth most common cause of death relating to cancer deaths in the United States.