This document compares and contrasts basal cell carcinoma (BCC) and squamous cell carcinoma (SCC). It discusses that BCC is more common but SCC occurs more often in immunosuppressed patients. BCC appears as a translucent pink nodule with telangiectasia, grows slowly, and rarely metastasizes, while SCC forms a firm red nodule or scaly patch with erosion and is more likely to metastasize to lymph nodes. Risk factors for BCC include sun exposure and fair skin, while risk factors for SCC include sun exposure, fair skin, and conditions weakening immunity. Diagnosis involves biopsy and treatment includes surgical excision or other local procedures.