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03.10.2018 | Original Article

Non-contrast-enhanced magnetic resonance angiography for detecting crossing renal vessels in infants and young children: comparison with contrast-enhanced angiography and surgical findings

verfasst von: Fiammetta Sertorio, Michela Cing Yu Wong, Veronica Incarbone, Angela Pistorio, Girolamo Mattioli, Gian Michele Magnano, Maria Beatrice Damasio

Erschienen in: Pediatric Radiology | Ausgabe 1/2019

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Abstract

Background

Knowing that ureteropelvic junction obstruction is due to a crossing renal vessel is essential in choosing the appropriate surgical treatment.

Objective

To evaluate the diagnostic accuracy of non-contrast magnetic resonance (MR) angiography in identifying crossing renal vessels in children younger than 4 years old with unilateral hydronephrosis.

Materials and methods

A retrospective review of preoperative MR urography of children with unilateral hydronephrosis was conducted by two independent readers. The presence or absence of crossing renal vessels was identified and compared with surgical findings.

Results

Twenty-nine patients were included. The disagreement between MR angiography with and without contrast enhancement in detecting a crossing renal vessel was 8%. The disagreement between non-contrast-enhanced MR and surgical findings was 17%. The disagreement between contrast-enhanced MR angiography and surgical findings was 25%. The balanced triggered angiography without contrast enhancement had a sensitivity of 70% (95% confidence interval [CI]: 35-93%) and a specificity of 93% (95% CI: 66-100%). Contrast-enhanced MR angiography had a sensitivity of 56% (95% CI: 21-86%) and a specificity of 91%. (95% CI: 59-100%).

Conclusion

MR without contrast enhancement may be a reliable, valid and safe alternative to contrast-enhanced MR angiography for identifying crossing renal vessels.

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Titel: Non-contrast-enhanced magnetic resonance angiography for detecting crossing renal vessels in infants and young children: comparison with contrast-enhanced angiography and surgical findings
verfasst von: Fiammetta Sertorio
Michela Cing Yu Wong
Veronica Incarbone
Angela Pistorio
Girolamo Mattioli
Gian Michele Magnano
Maria Beatrice Damasio
Publikationsdatum: 03.10.2018
Verlag: Springer Berlin Heidelberg
Erschienen in: Pediatric Radiology / Ausgabe 1/2019
Print ISSN: 0301-0449
Elektronische ISSN: 1432-1998
DOI: https://doi.org/10.1007/s00247-018-4252-3

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Non-contrast-enhanced magnetic resonance angiography for detecting crossing renal vessels in infants and young children: comparison with contrast-enhanced angiography and surgical findings

Abstract

Background

Objective

Materials and methods

Results

Conclusion

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Abstract

Background

Objective

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Results

Conclusion

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