Figure 2: Ultraviolet radiation induced basal cell carcinoma on the left side of the nose. Basal cell skin cancers erode tissue locally, can be quite disfiguring, and do not usually spread or metastasize distantly to other organs. Source: US Centers for Disease Control and Prevention (CDC) No copyright permission required. Available at http://www.cdc.gov/excite/skincancer/mod10.htm