A benign tumor composed mainly of newly formed blood vessels, similar to a hemangioma.
From Greek 'angeion' (vessel) + '-noma' (tumor/swelling). This less common synonym for hemangioma uses the same Greek root structure but is less frequently used in modern medical terminology.
Angionomas and hemangiomas are essentially the same thing—benign blood vessel tumors that doctors used to call by several different names before medical language standardized.
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