Diagnosis of Renal Pelvis Subepithelial Hemorrhage Using Unenhanced Helical CT
Alexi Phinney1,2,
Julian Hanson1 and
Lee B. Talner1
1
Department of Radiology, Harborview Medical Center, University of Washington
School of Medicine, 325 Ninth Ave, Seattle, WA 98104
2
Department of Radiology, Virginia Mason Medical Center, Box 900, Seattle, WA
98111.

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Fig. 1A. 41-year-old man receiving anticoagulation therapy who presented with
gross hematuria and right-sided flank pain. Unenhanced helical renal CT scan
shows high-attenuation thickening of pelviureteric wall caused by hemorrhage
(arrows).
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Fig. 1B. 41-year-old man receiving anticoagulation therapy who presented with
gross hematuria and right-sided flank pain. IV contrast-enhanced helical CT
scan shows mild calyceal dilatation and constriction of lumen of renal pelvis.
Fact that pelviureteral wall thickening (arrows) is caused by
hemorrhage is not obvious on contrast-enhanced scan.
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Fig. 1C. 41-year-old man receiving anticoagulation therapy who presented with
gross hematuria and right-sided flank pain. Unenhanced helical renal CT scan
obtained during CT urography 1 month before A and B shows renal
pelvis with normal appearance (arrows).
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