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Figure 1. Basal-Cell Carcinoma.
Basal-cell carcinoma appears most frequently as a classic pearly papule (Panel A). It can also take other forms. Panel B shows multiple superficial multicentric lesions on a patient's back that may be associated with the ingestion of inorganic arsenic, Panel C shows a single pigmented lesion that can be mistaken for a melanoma, and Panel D shows a cicatricial lesion, present for five years on the forehead of a 29-year-old woman.
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