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Uncomplicated duplex kidney and DMSA scintigraphy in children with urinary tract infection.

Artikel i vetenskaplig tidskrift
Författare Eira Stokland
Ulf Jodal
Rune Sixt
Svante Swerkersson
Sverker Hansson
Publicerad i Pediatric radiology
Volym 37
Nummer/häfte 8
Sidor 826-8
ISSN 0301-0449
Publiceringsår 2007
Publicerad vid Institutionen för kliniska vetenskaper
Sidor 826-8
Språk en
Länkar dx.doi.org/10.1007/s00247-007-0518-...
Ämnesord Female, Humans, Infant, Infant, Newborn, Kidney, abnormalities, radionuclide imaging, Male, Radiopharmaceuticals, diagnostic use, Retrospective Studies, Technetium Tc 99m Dimercaptosuccinic Acid, diagnostic use, Urinary Tract Infections, radionuclide imaging, Urography
Ämneskategorier Njursjukdomar, Pediatrik

Sammanfattning

BACKGROUND: Renal duplication is the most common malformation of the urinary tract and is frequently seen among children with urinary tract infection (UTI). OBJECTIVE: To evaluate problems in the interpretation of dimercaptosuccinic acid (DMSA) scintigraphy and to establish the range of relative function in uncomplicated unilateral duplication. MATERIALS AND METHODS: Retrospective analysis of 303 children less than 2 years of age with first time non-obstructive urinary tract infection investigated by both urography and DMSA scintigraphy. At DMSA scintigraphy, renal lesions and/or relative function below 45% was considered abnormal. Urography was used as reference for the diagnosis of duplication. RESULTS: Duplex kidneys were found in 22 of 303 patients (7%). Of the 16 children with unilateral duplication, 10 had bilaterally undamaged kidneys with a range of relative function varying between 51% and 57% in the duplex kidney. In two of the children with unilateral duplication the imaging results were discordant. CONCLUSION: There was risk of underdiagnosis as well as overdiagnosis of renal damage at scintigraphy. Although it is important to be aware of this risk, the rate of misinterpretation was low. A range of 51% to 57% can be used as the limit for normality of the relative function of a unilateral duplex kidney.

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