DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Haemangioma. Close-up of a small dark red, raised haemangioma (centre) on adult human skin on the scalp. A haemangioma is caused by the abnormal distribution of blood vessels under the skin. The capillaries (small blood vessels) are knotted and distended. This condition is sometimes referred to as a benign tumour of the blood vessels. Haemang- iomas often appear on the skin as a type of birth- mark (naevus). Haemangiomas do not usually require treatment unless they are starting to bleed; or if they are growing above the eye and obscuring the vision. Removal is carried out by laser treatment, cryosurgery (destruction of the tissue by extreme cold), plastic surgery or radiotherapy.
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