A vascular tumor, present at birth or developing during life, in which proliferation of blood vessels leads to a mass that resembles a neoplasm; hemangiomas can occur anywhere in the body but are most frequently noticed in the skin and subcutaneous tissues; most hemangiomas present at birth undergo spontaneouos regression.
[hemangio- + G. -oma, tumor]
See Also: nevus
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Examples: glitazone, GI cocktail, etc.