DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Large seborrhoeic wart (on nose) & a smaller basal cell carcinoma (on lower eyelid) on a man's face. Basal cell carcinoma (also called rodent ulcer) is the most common type of skin cancer, most frequently occurring on the head & face. Basal cell skin cancers are related to long term, chronic exposure to the sun's ultraviolet radiation; agricultural and construction workers are most at risk. The cancer may be successfully treated if diagnosed and removed before secondary complications occur. Seborrhoeic warts are produced by excessive secretion of sebum by the sebaceous glands; the nose is a typical site.
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