Cutaneous Squamous Cell Carcinoma (cSCC) is a type of skin cancer that develops in the squamous cells, which are the thin, flat cells that make up the outer layer of the skin. It is the second most common type of skin cancer, and it can occur anywhere on the body. Symptoms of cSCC include a scaly or crusty patch of skin, a sore that does not heal, or a raised bump that may bleed. Treatment for cSCC typically involves surgery to remove the cancerous cells, and in some cases, radiation therapy or chemotherapy may be used.