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European Radiology

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01-03-2020 | Kidney Cancer | Computed Tomography

Examining the upper urinary tract in patients with hematuria—time to revise the CT urography protocol?

Authors: Erik Rud, Kristina Flor Galtung, Peter Mæhre Lauritzen, Eduard Baco, Tove Flatabø, Gunnar Sandbæk

Published in: European Radiology | Issue 3/2020

Abstract

Background

Three-phase CT urography (CTU) is the gold standard for evaluating the upper urinary tract in patients with hematuria. We aimed to evaluate the accuracy of CTU for detecting upper urothelial cell carcinomas (UCC) in patients with hematuria and negative cystoscopy. Secondly, we aimed to determine the tumor visibility on each CTU phase.

Material and methods

This retrospective study included all patients with hematuria referred to CTU after a negative cystoscopy during 2016 and 2017. The original CTU reports were dichotomized as negative or positive. All patient charts were reviewed after a minimum of 18-month follow-up in order to register missed cancers. The results of biopsies and clinical follow-up were used as the reference standard. Two reviewers retrospectively evaluated the tumor visibility of each CT sequence in all true-positive CTUs.

Results

We included 376 patients with hematuria who underwent CTU after a negative cystoscopy. Macroscopic and microscopic hematuria occurred in 87% (327) and 13% (49), respectively. The incidence of upper urothelial cell carcinoma was 1.9% (7), and the sensitivity of CTU was 100% (95% CI, 59–100), specificity was 99% (95% CI, 98–100), positive predictive value was 88% (95% CI, 47–99), and negative predictive value was 100% (95% CI, 99–100). The accuracy was 99% (95% CI, 90–100). All UCCs were visible on the nephrographic phase for both reviewers.

Conclusion

CTU is highly accurate for detecting upper UCCs. All cases were seen on the nephrographic phase. This suggests that the CTU protocol can be simplified.

Key Points

• CT urography is highly accurate for detecting upper urothelial cell carcinomas.

• All cancers were seen on the nephrographic phase.

• All cancers were detected in patients with macroscopic hematuria.

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Title: Examining the upper urinary tract in patients with hematuria—time to revise the CT urography protocol?
Authors: Erik Rud
Kristina Flor Galtung
Peter Mæhre Lauritzen
Eduard Baco
Tove Flatabø
Gunnar Sandbæk
Publication date: 01-03-2020
Publisher: Springer Berlin Heidelberg
Keywords: Kidney Cancer
Urothelial Cancer
Kidney Cancer
Urography
Kidney Cancer
Urothelial Cancer
Hematuria
Published in: European Radiology / Issue 3/2020
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-019-06521-0

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Examining the upper urinary tract in patients with hematuria—time to revise the CT urography protocol?

Abstract

Background

Material and methods

Results

Conclusion

Key Points

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Material and methods

Results

Conclusion

Key Points

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