Is renal scintigraphy necessary after heminephrectomy in children?

Area of Science:

• Pediatric Urology
• Medical Imaging
• Nephrology

Background:

• Heminephrectomy is a viable treatment for poorly functioning moieties in duplicated collecting systems.
• Assessing the functional loss of the remaining kidney post-heminephrectomy is crucial.
• Renal scintigraphy, the gold standard, is costly, invasive, and involves radiation exposure.

Purpose of the Study:

• To compare Doppler renal ultrasound (RUS) with renal scintigraphy.
• To determine the viability of the remaining ipsilateral moiety after heminephrectomy in children.
• To evaluate RUS as a potential alternative to scintigraphy.

Main Methods:

• Retrospective review of pediatric patients undergoing heminephrectomy (2006-2013).
• Inclusion criteria: postoperative Doppler RUS and renal scintigraphy.
• Blinded radiologist independently reviewed Doppler RUS, correlating vascular flow with scintigraphy findings.

Main Results:

• 29 children were included in the study.
• Average ipsilateral renal function decrease was 3.6% post-heminephrectomy.
• Doppler RUS confirmed vascular flow in all remaining moieties, consistent with scintigraphy findings.

Conclusions:

• Doppler RUS is an accurate method for assessing post-heminephrectomy renal moiety viability.
• This modality may eliminate the need for renal scintigraphy.
• Further studies are needed to address limitations like single-institution design and potential interobserver variability.