DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Solar keratosis growth on the forehead of a 77-year-old man. Also known as actinic keratosis, this patient's keratosis is moderately atypical. Solar keratoses are mostly found on areas of skin that are exposed to the sun, including the backs of hands and the face. It is important to remove the lesions as they can develop into skin cancer. They may be removed by scraping, freezing with liquid nitrogen, or surgery.
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