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Aneurysm

Definition(s)

Protruding sac in the wall of a vein, artery, or heart, frequently caused by microbial infection; may present as pain, pressure on nearby organs, or cardiac weakening.: Definition from: CRISP Thesaurus via Unified Medical Language System at the National Library of Medicine
A sac formed by the dilatation of the wall of an artery, a vein, or the heart.: Definition from: MeSH via Unified Medical Language System at the National Library of Medicine
An abnormal blood-filled dilatation of a blood vessel and especially an artery resulting from disease of the vessel wall.: Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.