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Comparison of under open-MRI and CT scan in treatment outcome of percutaneous renal cryoablation for small renal tumors

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A Comparison of under Open-MRI and CT scan in Treatment Outcome of Percutaneous Renal Cryoablation for Small Renal Tumors.


ObjectivesTo compare with under Open-MRI and CT scan in treatment outcome of percutaneous approach for renal cryoablation for small renal tumors.

Materials and MethodsFrom September 2011 and December 2014, 104 patients underwent percutaneous renal cryoablation of small renal tumors. Double freeze-thaw cycles were conducted throughout the procedure using 17 gauge cryoprobes. After successful cryoablation, patients were followed on a regular basis to evaluate the treatment's clinical outcome. Treatment approaches and their oncological outcomes were retrospectively analyzed.

ResultsMedian follow up from time of procedure is 14.2 (range,1-42) months. 56 cases were performed renal cryoablation under Open-MRI while 48 were done under CT scan. The mean tumor size were 25.7 and 27.0 mm in each approach, respectively. The mean time of the procedures were 121.3 and 89.7 minutes, respectively. Peri-treatment side effects were equivalent and disease-specific survival rates were both 100%. Treatment success rates were also equivalent as 85.5% (47/55) and 86.8% (33/38), respectively.

ConclusionsBoth approaches in percutaneous renal cryoablation are safe and feasible. Technical and clinical success rates are similar to those of patients who undergo renal cryoablation under Open-MRI and CT scan. The ideal candidates for each approaching modalities still need to be determined in longer follow up with diligent observation.

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