Squamous Cell Carcinoma (SCC) is the second most common type of skin cancer. They are abnormal, uncontrolled growths or lesions that arise in the skin’s squamous cells, which compose most of the skin’s upper layers. SCC usually looks like scaly patches, open sores, or elevated growths. Untreated, SCC can grow large or spread to other parts of your body, causing serious complications or even death.