| AAS | Aarskog-Scott [syndrome]; acid aspiration syndrome; alcoholic abstinence syndrome; American Academy ... |
|---|---|
| ACA | abnormal coronary artery; acrodermatitis chronica atrophicans; acute cerebellar ataxia; adenocarcino... |
| AN | acanthosis nigricans; acne neonatorum; acoustic neuroma; adult, normal; ala nasi; amyl nitrate; aneu... |
| CAA | carotid audiofrequency analysis; cerebral amyloid angiopathy; circulating anodic antigen; Clean Air ... |
| FA | false aneurysm; Families Anonymous; Fanconi anemia; far advanced; fatty acid; febrile antigen; femor... |
| 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) |
| Rasmussen's aneurysm | Aneurysmal dilation of a branch of a pulmonary artery in a tuberculous cavity, rupture of which may cause serious haemoptysis. Aneurysm of the right ventricle or right ventricular outflow patch, aneurysm occurring after right ventriculostomy; the aneurysm may either be a false or a true aneurysm. (05 Mar 2000) |