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Nephron sparing surgery outcomes in Wilms’ tumor: is it ready for primetime?

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Abstract

Purpose

Radical nephrectomy is the gold standard in Wilms tumor (WT) treatment and is combined with adjuvant treatment in early stage disease or performed after neo adjuvant therapy in advanced disease. With the development of novel adjuvant and neoadjuvant therapeutic strategies, there is increasing interest in organ preserving procedures in several adult malignancies. Potential long-term complications of living with a single kidney include hyperfiltration syndrome, hypertension, and fluid retention. If NSS (Nephron Sparing Surgery) were to be adopted for the treatment of WT it would be necessary to preserve the gains in Overall Survival (OS) seen with current treatment protocols. With this in mind we undertook a study of outcomes of NSS performed in the USA using a large population-based registry.

Methods

We retrospectively queried the SEER Research Plus 18-registries Database 2010–2018 for patients 18 years old or younger with Wilms tumor as determined by ICD-O-3 code 8960. Clinical and demographic data was extracted, and statistical analysis was performed in GraphPad PRISM 9 with bivariate analysis and log-rank analysis to determine survival.

Results

1087 patients with Wilms tumor were identified. 73 (6.72%) underwent nephron-sparing surgery. The final cohort consisted of 45 patients (64%) who underwent unilateral NSS and 25 patients (36%) who underwent bilateral NSS. Three were excluded from analysis due to non-renal origin of tumor. Mean age was 3.214 years (std dev 3.807). Demographics were similar between the groups, apart from younger age associated with bilateral tumor (p = 0.0441). No differences were found between radiation use (p = 0.4280), chemotherapy use (p = 0.5479), tumor size (p = 0.2186), positive regional lymph nodes (p = 0.707). Log-rank analysis demonstrated that cancer-specific survival was not significantly different between unilateral and bilateral NSS or radical nephrectomy (p = 0.4539).

Conclusion

NSS may preserve renal function long-term, an important consideration in the pediatric population. Prospective study is necessary to select the appropriate patient subsets who may benefit from NSS in WT.

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Authors and Affiliations

  1. Department of Pediatric Surgery, Rutgers, Robert Wood Johnson Medical School, 504 Medical Education Building, New Brunswick, NJ, 08901, USA

    Nareena Imam & Sathyaprasad Burjonrappa

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  1. Nareena Imam
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Contributions

NI: Data collection, analysis, preparation of manuscript. SB: Project Initiation, Critical revision, data analysis, manuscript revision, quality control.

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Correspondence to Sathyaprasad Burjonrappa.

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Dr.S.Burjonrappa and Medical Student N.Imam do not have any conflict of interest.

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Imam, N., Burjonrappa, S. Nephron sparing surgery outcomes in Wilms’ tumor: is it ready for primetime?. Pediatr Surg Int 39, 5 (2023). https://doi.org/10.1007/s00383-022-05299-5

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