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Urographic renal size in acute pyelonephritis in childhood
B Johansson1, S Troell, U Berg
1Department of Pediatrics, Huddinge University Hospital, Sweden.
Insights
Acute pyelonephritis in children can temporarily enlarge kidneys. Urography during infection overestimates renal size compared to follow-up assessments two months later.
Area of Science:
- Pediatric Nephrology
- Diagnostic Imaging
Background:
- Acute pyelonephritis is a common kidney infection in children.
- Accurate assessment of renal size is crucial for monitoring kidney health and potential damage.
- Urography is a standard imaging technique used to evaluate the urinary tract.
Purpose of the Study:
- To investigate the impact of acute pyelonephritis on renal size in children.
- To determine if urography accurately reflects true renal size during acute infection.
Main Methods:
- Seventeen children diagnosed with acute pyelonephritis underwent urography.
- Renal size was measured (renal length and parenchymal area) during the acute infection.
- Follow-up urography was performed approximately two months after the infection resolved.
Main Results:
- Renal size, assessed by both length and parenchymal area, was significantly larger during the acute pyelonephritic infection.
- Follow-up examinations showed a reduction in renal size compared to the acute phase.
Conclusions:
- Urography performed during acute pyelonephritis in children may overestimate actual renal size.
- This overestimation highlights the importance of considering the timing of imaging relative to infection status.
- Follow-up imaging is recommended to establish baseline renal size after acute pyelonephritis.
Abstract:
Eighteen children with acute pyelonephritis were investigated by urography at the time of and about two months after the acute infection. Renal size was evaluated as renal length and parenchymal area. During the acute infection renal size was larger than at the follow-up examination two months later. In conclusion, urography performed in close connection with the acute pyelonephritic infection gives an overestimation of renal size.