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Unilateral duplicated system: comparative length and function of the kidneys.
Miriam Davidovits1, Bella Eisenstein, Niza Ziv
1Department of Nephrology, Schneider Children's Medical Center of Israel, Petah Tiqva. mdavidovits@clalit.org.il.
Clinical Nuclear Medicine
|January 22, 2004
Summary
Unilateral duplex kidneys can be larger and contribute more to overall kidney function than expected. This finding is crucial when assessing kidney size disparities.
Area of Science:
- Nephrology
- Radiology
- Pediatric Urology
Background:
- Unilateral duplex kidney is a congenital anomaly.
- Accurate assessment of kidney size and function is vital in pediatric nephrology.
Purpose of the Study:
- To estimate kidney length and function in patients diagnosed with unilateral duplex kidney.
- To investigate the impact of a duplicated renal system on individual kidney size and contribution to overall renal function.
Main Methods:
- Retrospective review of 13 patients with unilateral duplicated systems.
- Kidney length measurement using ultrasound.
- Relative renal function assessment via renal scan.
Main Results:
- Duplex kidneys were exclusively left-sided in this cohort.
- Ultrasound revealed enlarged duplex kidneys (up to +4.3 SDs) compared to contralateral kidneys.
- Duplicated systems contributed 51-67% to total renal function, while contralateral kidneys contributed 33-49%.
Conclusions:
- Kidneys with a duplicated system may exhibit increased size and functional contribution.
- A unilateral duplicated system should be considered when significant kidney length disparity is observed.