Work-up of urinary tract infection in infants and children

Area of Science:

• Pediatric Nephrology
• Diagnostic Imaging in Urology
• Pediatric Urology

Background:

• Urinary tract infections (UTIs) in infants and children require prompt differentiation between upper (pyelonephritis) and lower (cystitis) to prevent renal damage.
• Various structural and functional urinary tract abnormalities can predispose children to recurrent or complicated UTIs.

Purpose of the Study:

• To review the spectrum of urinary tract abnormalities associated with pediatric UTIs.
• To outline current imaging modalities for the diagnosis and management of UTIs in children.
• To present algorithms for the work-up of UTIs in different pediatric age groups.

Main Methods:

• Pictorial review of structural and functional urinary tract abnormalities.
• Discussion of imaging modalities including sonography (ultrasound), voiding cystourethrogram (VCUG), and nuclear renal scintigraphy (NRS).
• Comparison of imaging techniques, highlighting the declining role of excretory urography and the specialized use of CT and MRI.

Main Results:

• Sonography is the primary imaging modality for assessing renal parameters.
• VCUG and NRS are valuable for evaluating vesicoureteral reflux and renal function, respectively.
• CT and MRI are reserved for complex cases requiring definitive diagnosis.

Conclusions:

• Accurate differentiation of upper and lower UTIs in children is essential for timely treatment and minimizing renal sequelae.
• A structured approach utilizing appropriate imaging modalities, guided by clinical presentation and age, is key to managing pediatric UTIs.
• Understanding predisposing urinary tract abnormalities aids in risk stratification and management planning.