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sABLATE: a simplified ABLATE score for prediction of complications and outcome in percutaneous thermal ablation of renal lesions


The aim of the study is to evaluate the performance of a simplified ABLATE score (sABLATE) in predicting complications and outcome with respect to RENAL, mRENAL, and ABLATE scores. This study included 136 renal lesions in 113 patients (M:F ratio = 2.5; mean age 70.8 years). 98 tumors underwent cryoablation at San Raffaele hospital between 01/2015 and 03/2020, while 37 underwent microwave ablation at San Paolo or Policlinico hospitals between 07/2016 and 03/2020. RENAL, mRENAL, ABLATE, and sABLATE scores were calculated using pre-procedural imaging. Data regarding complications and follow-up were registered. Mann–Whitney U test, ROC analyses, and logistic regression analyses were used for complications. Cox-regression analyses were performed for outcome. Mean tumor diameter was 23.2 mm. Mean and median RENAL, mRENAL, ABLATE, and sABLATE scores were 6.8 and 7, 6.9 and 7, 5.3, and 5, and 3.5 and 3, respectively. During a mean follow-up of 21.9 months (range 1–73), we registered 7 complications, 3 cases of residual disease, and 10 local tumor progressions. Mann–Whitney U test p values for complications for RENAL, mRENAL, ABLATE, and sABLATE were 0.51, 0.49, 0.66, and 0.056, respectively. ROC analyses for complications showed an AUC for RENAL, mRENAL, ABLATE, and sABLATE of 0.57, 0.57, 0.55, and 0.71, respectively. Regarding outcome, HR and p values of Cox-regression analyses were 1.30 and 0.36 for RENAL, 1.33 and 0.35 for mRENAL, 2.16 and 0.01 for ABLATE, 2.29 and 0.004 for sABLATE. sABLATE was the only score close to significance for complications, representing a progress even if not definitive. Regarding outcome, ABLATE confirmed its value, and sABLATE maintained validity despite being a simplification.

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Data availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.


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We thank Giacomo Mason, PhD, who provided statistical support and expertise for this research.


No funding was received for conducting this study.

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We declare that all authors have significantly contributed to all the steps of this research project, from ideation to final manuscript review. All authors have read and agreed to the submitted version of the manuscript.

Corresponding author

Correspondence to Maurizio Papa.

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The authors have no conflict of interest to declare that are relevant to the content of this article.

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Ethical approval was given by IRBs/ Ethical approval was waived by IRB in view of the retrospective nature of the study and all the procedures performed were part of the routine care. The study was performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.

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Waived by IRB for this retrospective study, which is observational and didn’t modify the routine care in any way.

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Waived by IRB as no identifying information is present in the current study.

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Papa, M., Biondetti, P., Colombo, R. et al. sABLATE: a simplified ABLATE score for prediction of complications and outcome in percutaneous thermal ablation of renal lesions. Med Oncol 38, 126 (2021).

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  • Ablation
  • Cryoablation
  • Microwave ablation
  • Renal cell carcinoma
  • Interventional oncology
  • Nephrometry