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[Role of DMSA scintigraphy in managing pediatric pyelonephritis]
1Unité de néphrologie métabolisme, HUG hôpital des Enfants, Genève, Suisse.
Insights
Dimercaptosuccinic acid (DMSA) scintigraphy detects kidney damage in children with pyelonephritis. This imaging helps determine treatment and reveals that older children are more prone to developing kidney scars.
Area of Science:
- Pediatric Nephrology
- Nuclear Medicine
- Infectious Diseases
Background:
- Pyelonephritis in children can cause lasting kidney damage, hypertension, and renal insufficiency.
- Inflammation is a key factor in the development of pyelonephritis.
- Early detection of renal lesions is crucial for preventing long-term complications.
Purpose of the Study:
- To evaluate the role of Dimercaptosuccinic acid (DMSA) scintigraphy in identifying acute renal lesions and scars in pediatric pyelonephritis.
- To assess the correlation between acute renal lesions, scar formation, age, and vesicoureteral reflux.
- To determine how DMSA scintigraphy can guide therapeutic decisions for pyelonephritis and vesicoureteral reflux.
Main Methods:
- Utilized Dimercaptosuccinic acid (DMSA) scintigraphy to detect acute renal lesions and subsequent renal scars in children diagnosed with pyelonephritis.
- Analyzed the incidence of scar development based on the presence of acute lesions identified by DMSA scintigraphy.
- Compared scar formation rates between different age groups (younger than 1 year vs. older than 5 years) and assessed the prevalence of vesicoureteral reflux in patients with scars.
Main Results:
- Sixty percent of children with acute renal lesions on DMSA scintigraphy during pyelonephritis developed renal scars.
- Children older than 5 years had a higher rate of scar development (70%) compared to those younger than 1 year (40%).
- Vesicoureteral reflux was present in only 40% of patients who developed renal scars.
Conclusions:
- DMSA scintigraphy is a sensitive and specific tool for detecting renal lesions and scars in pediatric pyelonephritis.
- Age is not a protective factor against scar formation; older children are more susceptible.
- DMSA findings are critical for optimizing treatment duration, deciding on parenteral therapy, and managing vesicoureteral reflux, enabling personalized therapeutic strategies based on renal involvement.
Abstract:
Pyelonephritis in children may lead to irreversible renal damage and eventually to arterial hypertension and renal insufficiency. Inflammation plays a central role in the pathogenesis of pyelonephritis. Dimercaptosuccinic acid (DMSA) scintigraphy permits detection of acute renal lesions and renal scars with high sensitivity and specificity. In our experience 60% of patients who had acute renal lesions on DMSA scintigraphy during pyelonephritis develop scars. Young age appears to be not a risk factor, as in our experience 70% of children older than 5 years develop scars compared to 40% for children younger than 1 year. In addition, only 40% of patients who develop scars have vesicoureteral reflux. DMSA scintigraphy may provide answers to important clinical questions: what is the optimal length of treatment of pyelonephritis? Is parenteral treatment necessary? What is the best treatment of vesicoureteral reflux? DMSA scintigraphy permits therapeutical decision-making according to the renal involvement in each of our patients.