Six Cases of Radiographic Ice Ball Involvement of the Ureter During Percutaneous Cryoablation for Renal Cancers.

Ice ball involvement of the ureter was identified on procedural computed tomography (CT) in six men (age range 55-88 years) among 297 patients who underwent PRC for renal tumors, from May 2012 to December 2017. For tumors near the ureter, hydrodissection and/or ureteral stent with retrograde warm saline perfusion is recommended to protect the ureter from cryoinjury [[2]]. Although we used hydrodissection in four patients to displace the ureter maximally from the tumor, ice ball involvement of the ureter occurred. [Extracted from the article]