Human papillomavirus (HPV) is ubiquitous in skin and has been linked with nonmelanoma skin cancer. Human papillomaviruses (HPVs) consists of more than 200 related viruses. More than 40 HPV types can be easily spread through sexual contact, contact from the skin and mucous membranes of infected people.
Melanoma is the most dangerous form of skin cancer. These cancerous growths develop when pigment-producing cells—known as melanocytes—mutate and become cancerous.
Skin cancer may spread from where it began to other parts of the body. The method used to stage melanoma is based on the thickness of the tumor and whether the cancer has spread to nearby lymph nodes or other parts of the body.