• Wen-Zhe Fan, Li-Zhi Niu, Yu Wang, Xue-Hua Yao, Ying-Qiang Zhang, Guo-Sheng Tan, Jian-Yong Yang, and Jia-Ping Li.
• Departments of Interventional Oncology Guangzhou, China.
• J Vasc Interv Radiol. 2016 Dec 1; 27 (12): 1798-1805.

PurposeTo evaluate the pain-alleviating effect of computed tomography (CT)-guided percutaneous cryoablation for recurrent retroperitoneal soft-tissue sarcomas (RPSs).Materials And MethodsData from 19 men and 20 women (median age, 50.3 y) with recurrent malignant RPS who underwent percutaneous cryoablation were reviewed retrospectively. A total of 50 tumors were treated by cryoablation, including a single tumor in 29 patients, 2 tumors in 9, and 3 tumors in 1. Adverse events and analgesic outcomes were compared as a function of tumor size (< 10 cm and ≥ 10 cm). Efficacy was assessed based on modified Response Evaluation Criteria In Solid Tumors and progression-free survival (PFS).ResultsGrade 1/2 adverse events included fever (n = 17), emesis (n = 7), frostbite (n = 5), and local pain (n = 4). The median follow-up period and PFS were 18.5 months (range, 12-42 mo) and 13.4 months ± 6.2, respectively. At the end of follow-up, 13 patients had died and 26 were living. The mean severe local pain scores on pretreatment day 1 and posttreatment days 1, 5, 10, 15, 20, and 25 were 7.49, 7.40, 6.51, 5.81, 5.35, 5.04, and 5.44, respectively, and significant differences versus pretreatment (P < .001) were reported for posttreatment days 5-25. Immediate relief occurred more frequently in the small-tumor group (4 of 7; 57.1%; P = .018), whereas delayed relief occurred more frequently in the large-tumor group (17 of 22; 77.3%; P = .030).ConclusionsMinimally invasive percutaneous cryoablation improves local pain and is a feasible treatment for recurrent RPSs.Copyright © 2016 SIR. Published by Elsevier Inc. All rights reserved.

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