Objective: This retrospective study aimed to access the correlations of RENAL, PADUA and NePhRO scores with operative complications, chronic kidney disease (CKD) upstaging, and oncologic outcomes after CT-guided percutaneous Microwave Ablation (MWA) of renal tumors in order to determine their status as independent predictors of outcomes after MWA. This study also aimed to generally evaluate the efficacy of MWA in treating renal tumors.
Methods: From January 2017 to December 2019, 18 patients with 27 renal tumors who had undergone simultaneous biopsy and MWA were recruited in this single-center retrospective study. Data collection included tumor characteristics, procedural protocols, complications, CKD upstaging data, local tumor control data and overall survival. All lesions were evaluated using RENAL, PADUA and NePhRO scores, and further analysis was performed to determine whether the scores were correlated with operative complications, CKD upstaging, local tumor control and overall survival.
Results: The minor and major complication rates were 16.7% and 0%, respectively. Two patients with solitary kidney experienced CKD upstaging. Local tumor recurrence was identified in one type of tumor (3.7%) in the first year of follow-up. L. parameter (P = .031), longitudinal (polar) location score (P = .011), Ne. parameter (P = .036), number of kidneys (P = .005), and number of lesions (P = .008), were predictive factors significantly associated with the occurrence of complications. Besides, CKD upstaging was associated with A. parameter (P = .032) and urinary collecting system score (P = .028). RENAL, PADUA, and NePhRO scores were significantly correlated with complications, overall survival, and CKD upstaging, respectively (P < .05).
Conclusion: CT-guided percutaneous MWA was found to be a valuable alternative in the treatment of renal tumors for selected patients. Furthermore, RENAL, PADUA and NePhRO scores were not independent predictors of outcomes of MWA.
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