Imaging modalities (US, MRI, CT) used to assess anatomical, morphological, and functional renal abnormalities in children
Target Population
Children with suspected or known renal diseases
Care Setting
General radiology settings with referral to specialized pediatric centers for rare or complex cases
Key Highlights
Ultrasound (US) is the first-line imaging modality for most pediatric renal pathologies with high evidence support.
MRI provides radiation-free, detailed anatomical and functional assessment, especially useful for tumors, complex anomalies, and unclear UTI complications.
CT is reserved as a second-line modality, limited to major trauma or complicated urolithiasis on a case-by-case basis.
Guideline-Based Recommendations
Diagnosis
Use US as the primary modality to evaluate kidney morphology, size, cortical echogenicity, corticomedullary differentiation, renal hilum, and collecting system.
Consider MRI for detailed anatomical assessment and functional imaging when US findings are inconclusive or complex pathology is suspected.
Limit CT use to severe trauma or complicated stone disease after careful consideration.
Management
Assess family history and perform follow-up imaging for incidentally detected renal cysts in children.
Describe cyst characteristics comprehensively on US including appearance, number, laterality, location, distribution, size, and internal features.
Refer rare or complex renal disorders to specialized pediatric centers.
Monitoring & Follow-up
Use US for ongoing monitoring of renal conditions, including congenital anomalies and cystic kidney disease progression.
Consider functional MR-urography or scintigraphy for functional kidney assessment when indicated.
Risks
Avoid unnecessary radiation exposure by limiting CT use in children.
Recognize that simple renal cysts are rare in children and may indicate underlying cystic kidney disease requiring further evaluation.
Patient & Prescribing Data
Pediatric patients with suspected or confirmed renal pathology
Imaging choice should prioritize radiation-free modalities with US as first-line; MRI reserved for complex cases; CT used sparingly for trauma or complicated stones.
Clinical Best Practices
Consider child-specific factors such as renal maturation, function, hydration status, bladder filling, posture, and positioning during imaging.
Differentiate renal cysts from other cystic or dilated structures (e.g., calyceal dilatation, urinomas, adrenal cysts) using detailed US criteria.
Follow published recommendations from ESPR, ESPN, and NEOCYST for cystic kidney disease evaluation and management.
by Magdalena Maria Woźniak, Damjana Ključevšek, Maria Beatrice Damasio, Luisa Lobo, Hans-Joachim Mentzel, Lil-Sofie Ording-Müller, Philippe Petit, Michael Riccabona, Samuel Stafrace, Anne M. Smets, Carmelo Sofia, Giulia Perucca
