DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Skin cancer. Large malignant (cancerous) tumour on the earlobe of a 94-year-old woman with squamous cell carcinoma. Squamous cells are flat scale-like cells in the upper layers of the skin. Squamous cell cancer is the second most common type of skin cancer. Most cases arise from pre-cancerous lesions known as solar keratoses, which are caused by sun damage. It mostly affects the elderly and is more frequent in men. When the tumour is this large the cancer may spread (metastasis) to other parts of the body. Treatment is with surgical removal of the tumour, combined with radiation therapy and chemotherapy.
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