PubMed · 7634007
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H S Khaira. 1995. Fibrodysplasia.. https://doi.org/10.1016/s1078-5884(05)80033-4
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Fibromuscular dysplasia is the most common cause of renovascular hypertension in young patients. Digital subtraction angiography is still the best investigation used to determine the location, extent and complication of renal artery involvement. String of beads appearance (reflecting multiple stenoses), aneurysms, focal or tubular stenosis are classic angiographic appearances. The aim of this pictorial essay is to illustrate the various imaging findings of renal artery fibromuscular dysplasia.
Fibromuscular dysplasia is a noninflammatory vascular disease that commonly affects the distal two thirds of the renal artery and branch vessels, but occasionally involves other arteries. Progression of stenosis occurs in 16%-38% of renal arteries. Although the etiology is unknown, genetic studies suggest a relationship to the angiotensin-converting enzyme I allele. Thin, young Caucasian women without a family history of hypertension are most commonly affected. An abdominal or flank systolic-diastolic bruit is an important clue for the diagnosis. Most noninvasive screening tests are not sensitive or reproducible to be used to rule out renal artery stenosis, but digital subtraction renal angiography usually confirms the diagnosis. Percutaneous renal artery angioplasty is the treatment of choice, but may not result in normalization of blood pressure if diagnosis is delayed. Since restenosis occurs, continued follow-up is necessary.
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