| dissecting thoracic aneurysm | <surgery> A condition in which a weakened portion of the thoracic aorta begins to tear along the longitudinal axis of the vessel. Symptoms include sudden, severe chest pain that may radiate to the back accompanied by nausea, sweating and difficulty breathing. A common risk factor for this event is atherosclerotic vascular disease and-or hypertension. Advanced cases of syphilis (syphilitic aortitis) can also result in acute thoracic dissection as a complication of infection with Treponema pallidum. (11 Jan 1998) |
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| ductal aneurysm | Aneurysm of the patent ductus arteriosus, occurs either in infants or adults. (05 Mar 2000) |
| iliac aneurysm | An aneurysm of the common, internal, or external iliac arteries. (12 Dec 1998) |
| infraclinoid aneurysm | An intracranial aneurysm occurring below the level of the anterior clinoid process of the sphenoid bone. (05 Mar 2000) |
| intracavernous aneurysm | An aneurysm of the carotid artery within the cavernous sinus. (05 Mar 2000) |
| intracranial aneurysm | <neurology> 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) |
| intracranial mycotic aneurysm | <radiology> 3% of all intracranial aneurysms; multiple in 20%, source: subacute bacterial endocarditis (65%), acute bacterial endocarditis (9%), menigitis (9%), septic thrombophlebitis (9%), myxoma, location: peripheral to first bifurcation of major vessel (64%), often near the surface of brain (especially over convexities), Note: develops recurrent bleeding more frequently than congenital aneurysms See: mycotic aneurysm (12 Dec 1998) |
| thoracic aortic aneurysm | <radiology> Normal size: 4-5 cm, most aneurysms rupture when more than 10 cm, mean age: 65 years; M:F = 3:1 associated with: hypertension, coronary artery disease, abdominal aortic aneurysm symptoms: substernal, back, shoulder pain (25%), superior vena cava syndrome, dysphagia, stridor, dyspnea, hoarseness see: aortic aneurysm (12 Dec 1998) |
| ectatic aneurysm | An aneurysm in which all the coats of the artery, though stretched, are unruptured. (05 Mar 2000) |
| embolomycotic aneurysm | An obsolete term for an aneurysm caused by an embolism composed of an infected vegetation from a cardiac valve. (05 Mar 2000) |
| traumatic aneurysm | An aneurysm resulting from physical damage to the wall of an artery; usually a false aneurysm or arteriovenous aneurysm. (05 Mar 2000) |
| true aneurysm | Localised dilation of an artery with an expanded lumen lined by stretched remnants of the arterial wall. (05 Mar 2000) |
| tubular aneurysm | The uniform dilation of an artery along a considerable distance. Synonym: cylindroid aneurysm. (05 Mar 2000) |
| fusiform aneurysm | An elongated spindle-shaped dilation of an artery. (05 Mar 2000) |