Kidney size in children with unilateral urinary duplication

Area of Science:

• Medical imaging and diagnostics
• Pediatric nephrology
• Urology

Background:

• Unilateral renal duplication is a congenital anomaly affecting the urinary system.
• Accurate assessment of kidney size is crucial for diagnosing and managing renal anomalies.
• Ectopic ureterocele is a known complication associated with renal duplication.

Purpose of the Study:

• To evaluate kidney length and length ratios in patients with unilateral renal duplication.
• To investigate the correlation between kidney size and associated conditions like ectopic ureterocele.
• To analyze the variability in kidney dimensions within the duplicated kidney cohort.

Main Methods:

• Utilized the Eklöf & Ringertz method for estimating absolute kidney length.
• Analyzed kidney length ratios (right to left) in 142 patients.
• Correlated kidney dimensions with the presence of ectopic ureterocele in 34 patients.

Main Results:

• The anomalous kidney in unilateral duplication was frequently larger than the contralateral kidney.
• A significant association was observed between larger anomalous kidney size and ectopic ureterocele.
• A notable proportion of duplicated kidneys exhibited lengths below the mean, with some falling below -2SD.

Conclusions:

• Kidney size in unilateral renal duplication shows considerable variability, not always indicating enlargement.
• Ectopic ureterocele is linked to increased anomalous kidney size in duplication.
• Standardized measurements are essential for characterizing renal dimensions in duplicated kidneys.