| CoA | Coarctation of Aorta - Complications 1. Severe Hypertensi... |
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| AAS | Aarskog-Scott [syndrome]; acid aspiration syndrome; alcoholic abstinence syndrome; American Academy ... |
| AN | acanthosis nigricans; acne neonatorum; acoustic neuroma; adult, normal; ala nasi; amyl nitrate; aneu... |
| IAAA | inflammatory abdominal aortic aneurysm |
| IASA | interatrial septal aneurysm |
| aortic aneurysm, abdominal | An aneurysm in that part of the aorta continuing from the thoracic region and giving rise to the inferior phrenic, lumbar, median sacral, mesenteric, renal, and ovarian or testicular arteries. (12 Dec 1998) |
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| aortic aneurysm, thoracic | An aneurysm in the proximal portion of the descending aorta proceeding from the arch of the aorta and giving rise to the bronchial, oesophageal, pericardiac, and mediastinal branches. (12 Dec 1998) |
| aortic sinus aneurysm | Abnormal dilation of one or more of the three aortic sinuses situated behind the three aortic valve cusps. (05 Mar 2000) |
| arteriosclerotic aneurysm | The most common type of aneurysm, occurring in the abdominal aorta and other large arteries, primarily in the elderly. Synonym: atherosclerotic aneurysm. (05 Mar 2000) |
| arteriovenous aneurysm | <anatomy> A dilated arteriovenous shunt where there is communication between an artery and a vein, sometimes congenital. (05 Mar 2000) |
| atherosclerotic aneurysm | The most common type of aneurysm, occurring in the abdominal aorta and other large arteries, primarily in the elderly. Synonym: atherosclerotic aneurysm. (05 Mar 2000) |
| axial aneurysm | An aneurysm involving the entire circumference of a blood vessel. (05 Mar 2000) |
| benign bone aneurysm | <radiology> ABC, 10 - 30 yrs, 75% before skeletal maturity, sites: long bones; also, flat bones Findings: metaphyseal if unfused, metaepiphyseal after fusion, lytic, expansile, thin, continuous rim, thin internal bony strands (12 Dec 1998) |
| Berard's aneurysm | An arteriovenous aneurysm in the tissues outside the injured vein. (05 Mar 2000) |
| berry aneurysm | <radiology> Associated with adult (autosomal dominant) PKD, multiple in 20%, sites: ACommA 30%, PCommA 25%, MCA 25% (12 Dec 1998) |
| brain aneurysm | A dilated and weakened portion of a cerebral blood vessel that is prone to rupture. A cerebral aneurysm may occur as a birth defect or develop as the result of long-standing poorly controlled hypertension. Symptoms of a ruptured cerebral aneurysm include a sudden, severe thunderclap headache that may be associated with nausea, vomiting and a decreased level of consciousness. (27 Sep 1997) |
| cardiac aneurysm | Thinning, stretching, and bulging of a weakened ventricular wall, usually as a result of myocardial infarction; rarely postinflammatory or congenital. Synonym: mural aneurysm, ventricular aneurysm. (05 Mar 2000) |
| racemose aneurysm | Dilation of a group of blood vessels owing to congenital malformation with arteriovenous shunting. Synonym: cirsoid varix, racemose aneurysm, racemose haemangioma. (05 Mar 2000) |
| varicose aneurysm | A blood-containing sac, communicating with both an artery and a vein. (05 Mar 2000) |
| vein of galen aneurysm | <radiology> Really AVM, not aneurysm, AVM of posterior choroidal branches of PCA, with or without congestive heart failure due to AV shunting (left to right), predominantly right-sided cardiomegaly, wide superior mediastinum, retrosternal fullness, cervical trachea displaced anteriorly (12 Dec 1998) |