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Query: UMLS:C0004153 (atherosclerosis)
 77,401 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Polyaneurysmal dystrophy is a novel form of arteriopathy which specific clinical, angiographic, anatomic and surgical features which distinguish it clearly from multiple atheromasclerotic aneurysm. It should be considered to be a local, multifocal accentuation of megadolicho-arteries, which constitute the lesions during the early stages of the disorder (fairly general elongation of the elastic arteries, with thin walls and regular increase in the caliber and multiple tortuousness). Arterial angiography identifies polyaneurysmal dystrophy; in the context of a twisted and sinuous system of large arteries, multiple spindle-shaped aneurysms can be distinguished which are frequently bilateral and symmetrical. The usual sites are the trunks of the aortic group and internal carotid, the ileo-femoral trunks and terminal aorta. The progress of the disorder is characterized by the possibility of rupture or thrombosis (particularly in the subcrural territory). The treatment is always surgical. The indication for surgery is inevitable in cases of severe ectasia, but may be avoidable in extensive forms of megadolicho-arteries with no clearly defined aneurysm: annual ultrasound monitoring is then called for. The disorder is of constitutional origin (and totally unrelated to atherosclerosis). Delayed dilatation of the aneurysms is due to the hemodynamic forces brought to bear on the fragile walls over a life-time. Multiple aneurysms occur mainly between the ages of 50 and 70 years, with a predominance of aorto-ileac sites in men, even though these subjects do not show any general elastic dysplasia. Half of the 45 patient undergoing surgery were hypertensive.
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PMID:[Polyaneurysmal dystrophy (ectatic medial dystrophy)]. 129 84

An autopsy study of cerebral vessels in 310 Ghanaian adults showed an incidence of macro(berry)aneurysms of 16.6% among 181 hypertensives and 8.5% among 129 normotensives. Hypertension increased the formation and development of intracranial aneurysms. Severe atherosclerosis (Grade 3) was not a common association with aneurysms and there was no increase in aneurysm formation in subjects dying from cerebral haemorrhage. This may be a reflection of the observed low incidence of severe cerebral atherosclerosis in Ghanaians compared to whites and an indication of differences between ethnic groups in the relative importance of the factors that contribute to the formation of aneurysms. Mortality from ruptured aneurysms could not be determined from this study, perhaps because the aneurysms seen were small in size (less than 10 mm diameter) and less likely to rupture and bleed. Multiple aneurysms were an uncommon finding compared to figures quoted in other studies, but in agreement with them the sites of predilection were in the anterior parts of the Circle of Willis; notably the anterior cerebral and anterior communicating arteries.
Atherosclerosis 1985 Jan
PMID:Cerebral macroaneurysms in a Ghanaian adult population. An autopsy study. 399 78

Multiple aneurysms are clinically common in population aged over sixty and are caused mainly by atherosclerosis. When occurring in young population other etiologies such as trauma, infections, Bechet's disease, Marfan syndrome, neurofibromatosis or inflammatory disease are responsible for the development of arterial aneurysms. A rare case of multiple aneurysms in a 40-year-old man, affecting the infrarenal part of abdominal aorta, both iliac arteries, common femoral arteries, left femoral superficial and popliteal arteries on, both legs, is reported. The underlying pathology was progressive atherosclerosis, favored by familial hyperlipidemia and excessive cigarette smoking.
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PMID:A rare case of multiple aneurysms in a young patient. 1661 4

We report a case of 58-year-old woman with a ruptured dissecting aneurysm of the middle colic artery (MCA). Her initial manifestation was sudden and severe right-sided abdominal pain, followed by hemorrhagic shock and acute anemia. Abdominal CT showed a right retroperitoneal hemorrhage. Emergency catheter angiography and therapeutic coil embolization of the middle colic artery were performed and micro aneurysms were enhanced in the jejunal branch. Immunological tests showed nothing abnormal. Follow-up angiography after 3 months showed that the micro aneurysms had disappeared. The patient was diagnosed as having segmental arterial mediolysis (SAM), because no definitive evidence of atherosclerosis and polyarteritis nodosa were observed. SAM is a rare disease of unknown etiology. The arterial lesions developing in elderly patients are characterized by segmental lysis of the abdominal splanchnic arteries resulting in aneurysms, and acute bleeding in a skip pattern. Multiple aneurysms and abdominal pain due to the rupture of these lesions in SAM resemble the clinical findings in polyarteritis nodosa. Differential diagnosis of the two diseases is important because steroid therapy is not beneficial for SAM.
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PMID:[A case report of segmental arterial mediolysis]. 1760 60