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  • Title: A comparison of renal function outcomes after nephron-sparing surgery and radical nephrectomy for nonsyndromic unilateral Wilms tumor.
    Author: Cost NG, Sawicz-Birkowska K, Kajbafzadeh AM, Tourchi A, Parigi GB, Guillén G, DeFoor WR, Apoznanski W.
    Journal: Urology; 2014 Jun; 83(6):1388-93. PubMed ID: 24768019.
    Abstract:
    OBJECTIVE: To better understand the impact of nephron-sparing surgery (NSS) on renal function in patients with nonsyndromic unilateral Wilms tumor (uWT), a group of such patients treated with NSS were compared with a stage-matched cohort managed with radical nephrectomy (RN). The recommended management of nonsyndromic uWT is RN. However, NSS may decrease the risk of long-term renal disease and associated comorbidities. MATERIALS AND METHODS: An international, multi-institutional review was conducted of nonsyndromic uWT cases managed with NSS and compared with a stage-matched RN cohort. Data were collected on demographics, oncologic characteristics and outcomes, serum creatinine, and estimated glomerular filtration rate (eGFR) calculated via Schwartz formula. RESULTS: Fifteen patients who underwent NSS (6 females and 9 males) met study criteria and were diagnosed at a median age of 2.5 years (range, 0.2-8.2 years) and followed for a median of 8.4 years (range, 0.5-31.8 years). The stage-matched RN cohort consisted of 15 patients (8 females and 7 males) diagnosed at a median age of 3.7 years (0.3-7.4) and followed for a median of 2.1 years (0.6-10.5 years). The median preoperative eGFR was 91.7 (39.4-237.7) and 149.9 (93.8-215.9) for NSS and RN, respectively, P=.026. The median eGFR at last follow-up was 135.3 (57.5-185.8) and 131.0 (98.6-161.2) for NSS and RN, respectively, P=.95. The median change in eGFR during the study period was a gain of 28.6 (-51.9 to 83.0) for the NSS cohort vs a loss of 19.1 (-54.7 to 25.2) for the RN cohort, P=.007. CONCLUSION: In a highly selected patient population with nonsyndromic uWT, NSS provides excellent renal function preservation when compared with RN. These data require validation via prospective investigation on a larger scale.
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