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Rodent ulcer on temple. Close-up of a rodent ulcer, showing a typical rolled edge and central scabbed area, on a patient's temple. This patient complained of a spot that kept bleeding, a symptom typical of rodent ulcers. Rodent ulcers (basal cell carcinoma) are the most common form of skin cancer among fair-skinned people, mostly affecting the elderly. They usually appear on the face and are thought to be caused by ultra-violet radiation in sunlight. Although they slowly destroy the surrounding tissue, they seldom spread to other parts of the body. This was the patient's second rodent ulcer.
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