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left: normal abdominal aorta
right: abdominal aortic aneurysm


also an·eu·rism  (ăn′yə-rĭz′əm)
An abnormal, blood-filled sac formed by dilation of the wall of a blood vessel or heart ventricle, most commonly the abdominal aorta and intracranial arteries, resulting from disease or trauma to the wall, as in atherosclerosis.

[Middle English aneurisme, ultimately from Greek aneurusma, from aneurein, to dilate : ana-, throughout; see ana- + eurus, wide.]

an′eu·rys′mal (-məl) adj.


(ˈænjəˌrɪzəm) or


(Medicine) a sac formed by abnormal dilation of the weakened wall of a blood vessel
[C15: from Greek aneurusma, from aneurunein to dilate, from eurunein to widen]
ˌaneuˈrysmal, ˌaneuˈrismal, ˌaneurysˈmatic, ˌaneurisˈmatic adj
ˌaneuˈrysmally, ˌaneuˈrismally, ˌaneurysˈmatically, ˌaneurisˈmatically adv


or an•eu•rism

(ˈæn yəˌrɪz əm)

a permanent cardiac or arterial dilatation usu. caused by weakening of the vessel wall.
[1650–60; < Greek aneúrysma dilation, derivative (with -(s)ma n. suffix of result) of aneurýnein to dilate (see an-3, eury-)]
an`eu•rys′mal, an`eu•ris′mal, adj.
an`eu•rys′mal•ly, an`eu•ris′mal•ly, adv.


A swelling in the wall of an artery or vein caused by disease or injury.

aneurism, aneurysm

a disease of the artery wall that causes a localized dilatation of the artery and a pulsating tumor.
See also: Blood and Blood Vessels
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.aneurysm - a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wallaneurysm - a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wall
cardiovascular disease - a disease of the heart or blood vessels
aortic aneurysm - an aneurysm of the aorta
cerebral aneurysm - an aneurysm of the carotid artery
intracranial aneurysm - an aneurysm of a cranial artery
ventricular aneurysm - a localized dilation or protrusion on the wall of the left ventricle of the heart (occurring after a myocardial infarction)


n. aneurisma, dilatación de una porción de la pared de una arteria;
aortic ______ aórtico;
berry ______ cerebral saculado;
cerebral ______ cerebral;
dissecting ______ disecante;
false ______ falso;
fusiform ______ fusiforme;
true ______verdadero.


n aneurisma m; abdominal aortic — aneurisma aórtico abdominal, aneurisma de aorta abdominal; dissecting — aneurisma disecante; mycotic — aneurisma micótico
References in periodicals archive ?
Hirst AE Jr, Johns VJ Jr, Kime SW Jr: Dissecting aneurysm of the aorta: A review of 505 cases.
Hirst A, Johns VJ, Krime SJ (1958) Dissecting aneurysm of the aorta: a review of 505 cases.
Dissecting aneurysm in a patient with autosomal dominant polycystic kidney disease.
The first dissecting aneurysm of pulmonary artery (PA) was reported by Walshe in 1862.
Dissecting Aneurysm of the Posterior Spinal Artery: Case Report and Review of the Literature.
There is litigation aplenty over failure-to-diagnose conditions such as myocardial infarction or a dissecting aneurysm (Cardiology 2008;109:263-72).
Evaluation of associated vascular abnormalities, such as saccular aneurysms, dissecting aneurysm and arteriovenous malformations is necessary at angiography.
Hemifacial spasm caused by a spontaneous dissecting aneurysm of the vertebral artery.
Misdiagnosis of an underlying cardiac condition such as a dissecting aneurysm in the setting of chest pain is a recurring malpractice allegation.
Fig-1: Contrast computed tomography scan showing the type A dissecting aneurysm of the aorta (arrow) with a maximal diameter of 8cm.
COMMENT lust yesterday, a malpractice lawyer presented me with a case very similar to this one: a patient with unexplained chest pain who died of a dissecting aneurysm.