title: Atherosclerotic renal artery stenosis: ostial or truncal?
abstract: OBJECTIVE
  To evaluate a discrepancy between the location of renal artery stenoses on intraarterial digital subtraction angiographic (DSA) images and that on spiral computed tomographic (CT) angiograms.
  
  
  METHODS
  The spiral CT angiograms and intraarterial DSA images of 40 consecutive patients with atherosclerotic renal artery stenoses were examined retrospectively. Stenoses were classified as truncal or ostial. The atherosclerotic changes in the abdominal aorta were graded.
  
  
  RESULTS
  Fifty-eight stenoses were demonstrated. In 48 ostial stenoses, there was no discrepancy in the location of the stenoses on spiral CT angiograms and DSA images. In 10 patients, spiral CT angiography showed an ostial lesion, whereas DSA demonstrated an apparent truncal lesion. Most of these stenoses ("pseudotruncal" ostial stenoses) were in patients with severe aortic atherosclerotic disease.
  
  
  CONCLUSIONS
  A renal artery stenosis at or within 10 mm of an atherosclerotic aorta at DSA may be diagnosed as an ostial stenosis.
authors.affiliation: Department of Radiology, University Hospital Utrecht, The Netherlands.
authors.forename: R
authors.initials: R
authors.lastname: Kaatee
authors.forename: F J
authors.initials: FJ
authors.lastname: Beek
authors.forename: E J
authors.initials: EJ
authors.lastname: Verschuyl
authors.forename: P J
authors.initials: PJ
authors.lastname: vd Ven
authors.forename: J J
authors.initials: JJ
authors.lastname: Beutler
authors.forename: J P
authors.initials: JP
authors.lastname: van Schaik
authors.forename: W P
authors.initials: WP
authors.lastname: Mali
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015901:Angiography, Digital Subtraction / Q000295:instrumentation / Q000379:methods; D001012:Aorta, Abdominal / Q000000981:diagnostic imaging; D001161:Arteriosclerosis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012077:Renal Artery / Q000000981:diagnostic imaging; D012078:Renal Artery Obstruction / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods