title: [Radio-anatomic study of the angle of origin of dysplastic renal arteries].
abstract: OBJECTIVE
  To compare the angulation at the origin of dysplastic renal arteries compared to atherosclerotic renal arteries, in order to improve the technique for percutaneous transluminal angioplasty of FMD.
  
  
  METHODS
  Retrospective analysis of 40 aortograms in patients who underwent renal angioplasty for dysplastic stenosis, with comparison with 45 control aortograms (with or without atherosclerotic lesions of the renal arteries). The angle of implantation of the renal arteries was measured relative to the aortic axis in the frontal plane, taking into account only the angulation of its proximal segment. We identified three types of kidneys with regard to their position relative to the renal artery ostium.
  
  
  RESULTS
  The angle of implantation of dysplastic renal arteries is significantly sharper compared with the control group (63.8 degrees vs 80.9 degrees, p = 0.0001), irrespective of the side. The angulation did not correlate with the position of the kidney or the direction of the renal artery, suggesting a congenital origin.
  
  
  CONCLUSIONS
  The angle of implantation of the dysplastic renal arteries relative to the aortic axis in the frontal plane is sharper than the angle measured in non dysplastic renal arteries.
authors.affiliation: Service de Radiologie, CHU Montpied, Clermont-Ferrand.
authors.forename: J M
authors.initials: JM
authors.lastname: Garcier
authors.forename: B
authors.initials: B
authors.lastname: Macheda
authors.forename: T
authors.initials: T
authors.lastname: Therre
authors.forename: C
authors.initials: C
authors.lastname: Privat
authors.forename: N
authors.initials: N
authors.lastname: Perez
authors.forename: A
authors.initials: A
authors.lastname: Ravel
authors.forename: J F
authors.initials: JF
authors.lastname: Viallet
authors.forename: G
authors.initials: G
authors.lastname: Vanneuville
authors.forename: L
authors.initials: L
authors.lastname: Boyer
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015901:Angiography, Digital Subtraction; D015906:Angioplasty, Balloon, Coronary; D001012:Aorta, Abdominal / Q000000981:diagnostic imaging; D016022:Case-Control Studies; D002648:Child; D005260:Female; D005352:Fibromuscular Dysplasia / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012077:Renal Artery / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D012078:Renal Artery Obstruction / Q000151:congenital / Q000000981:diagnostic imaging* / Q000473:pathology / Q000628:therapy; D012189:Retrospective Studies