Abstract
Cryoablation is a minimally invasive procedure to treat painful bone metastases in patients with cancer. We designed a systematic review to understand the safety and effects of cryoablation on the pain and quality of life (QoL) of cancer patients. We searched PubMed, ISI, Cochrane library, and Scopus databases using the keywords "Cryoablation," "Pain," and "Bone metastasis." Inclusion criteria were: (1) Original studies published until September 8, 2022; (2) studies on patients over 18years and affected by bone metastasis; (3) bone metastasis treated with stand-alone cryoablation; (4) studies reporting patients' pain before and at least one time-point following cryoablation; and (5) English-language studies. We screened 696 articles. Fifteen studies on 376 patients were included. Time points for pain assessment ranged from 1day to 6months. Spine was the most frequent treated location. All studies reported a significant pain reduction between 1day and 6months after the cryoablation procedure. The highest mean difference between pre- and post-procedure scores was 5.8 (VAS scale) after 4 weeks. The overall rate of minor and major complications was 12.74%. Cryoablation improved the QoL of cancer patients and decreased the need for analgesics. Cryoablation is a safe and useful procedure for palliating painful bone metastasis and increasing the QoL of cancer patients. Future studies should adopt a standardized pain reporting scale to allow for meta-analysis.
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