DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Infected wound after rodent ulcer excision. Close-up of an infected wound on a patient's hand after surgical removal of a rodent ulcer (basal cell carcinoma). Rodent ulcers are the most common form of skin cancer in fair-skinned people. They mostly affect the elderly, are non-malignant, and result from mutations induced by ultraviolet radiation in sunlight. The tumour starts as a small nodule that gradually destroys surrounding tissue, breaking down at the centre to form an ulcer. Treatment includes surgical removal and radiotherapy.
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