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Follow-up studies of multicystic dysplastic kidneys
L Vinocur1, T L Slovis, A D Perlmutter
1Department of Urology, Children's Hospital of Michigan, Detroit 48201.
Radiology
|May 1, 1988
Summary
Multicystic dysplastic kidney (MCDK) often resolves spontaneously. Surgical removal is typically unnecessary unless the kidney grows significantly in the first year, suggesting a need for longer follow-up.
Area of Science:
- Pediatric Nephrology
- Urology
- Diagnostic Imaging
Background:
- Multicystic dysplastic kidney (MCDK) is a common congenital anomaly.
- Management strategies for MCDK vary, with surgical intervention (nephrectomy) being one option.
Purpose of the Study:
- To evaluate the natural history and outcomes of multicystic dysplastic kidney (MCDK).
- To determine the necessity of nephrectomy for classic and hydronephrotic MCDK.
Main Methods:
- Retrospective review of 30 multicystic dysplastic kidney (MCDK) cases diagnosed over 11 years.
- Analysis of patient follow-up data, including imaging (ultrasound) and clinical outcomes.
- Comparison of outcomes between patients who underwent nephrectomy and those managed conservatively.
Main Results:
- Nine patients (30%) underwent nephrectomy; three for classic MCDK with increasing size, six for hydronephrotic MCDK with inconclusive diagnosis.
- Of 21 conservatively managed patients, 16 MCDK lesions remained stable, one decreased in size, and two disappeared within 3 years.
- Associated conditions included non-renin-producing hypertension, nephroblastomatosis, and contralateral pyelonephritis.
Conclusions:
- Classic MCDK diagnosed via imaging may not require removal unless growth is observed in the first year.
- A significant percentage of MCDK lesions resolve spontaneously over time, supporting extended follow-up.
- Conservative management with prolonged observation is a viable option for many MCDK cases.