Squamous cell carcinoma is a type of cancer that develops in the outer layer of skin. It’s usually found on the scalp, ears and other sun-exposed areas, but it can occur on any part of the body, including inside the mouth.
Squamous cell carcinoma is most often found in people age 50 or older. Key risk factors include chronic exposure to sunlight and frequent use of tanning beds. It is usually not life-threatening, yet if left untreated it can spread to other parts of the body.