MID ESSEX HOSPITAL SERVICES NHS TRUST / SCIENCE PHOTO LIBRARY MID ESSEX HOSPITAL SERVICES NHS TRUST / SCIENCE PHOTO LIBRARY
Dermatoscope image of a seborrheic keratosis on the face of a 68 year old male patient. This skin growth, also known as a seborrheic wart, is caused by overproduction of keratin, the tough fibrous protein found in hair and the outer layer of skin. Keratoses range from flat, dark brown rough patches to small, wart-like protrusions covered with a greasy, removable crust. They are mainly found on the trunk and usually occur in elderly patients. They are harmless, but as they are unsightly can be removed by cryosurgery (destruction of tissue using extreme cold) or surgical excision.
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