NMSC cancer refers to a group of cancers that slowly develop in the top layers of the skin. They are commoner and generally considered less dangerous than melanoma. They are curable in most cases.
The exact cause of NMSC is unknown although it has been linked to exposure to ultraviolet (UV) light (sunlight, tanning beds, etc), radiation, gene aberrations, blonde hair, pale skin (does not tan easily), older age, family history, immunosuppressive medications, some chemicals like arsenic and previous personal history of skin cancer
NMSCs usually develop in the outermost layer of skin (epidermis) and are often named after the type of skin cell from which they develop. The two most common examples of non-melanoma skin cancer are: