angioma (an-ji-oh-mă) n. (pl. angiomata) a benign tumour composed of blood vessels or lymph vessels. arteriovenous a. (arteriovenous malformation, AVM) a knot of distended blood vessels that may occur in many parts of the body. When overlying and compressing the surface of the brain, it may cause epilepsy or subdural haematoma. cherry a. (Campbell de Morgan spot) a small red spot, consisting of a minor vascular malformation, occurring on the trunk in middle-aged and elderly people. See also haemangioma, lymphangioma.
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