denosumab in patients with giant cell tumor and its recurrence: a systematic review

Recent studies suggest that denosumab reduces tumor size, therefore, makes the surgery easier with lowermorbidity. however, some studies have reported several complications for this drug. so, this systematic reviewwas performed to determine the effectiveness and safety of denosumab in reducing bone destructions activity ofgiant cell tumor and skeletal-related events (sre) in affected patients with giant cell tumor of bone (gctb) and itsrecurrence.we explored studies in pubmed, and cochrane library. for this purpose, articles of various levels were retrieveduntil october 22, 2016. two reviewers assessed the articles independently based on predefined criteria to extract therelevant data. primary outcomes associated with skeletal-related event, overall survival, and secondary outcomessuch as pain, quality of life and adverse events were evaluated and analyzed.the total population of this meta-analysis consisted of 686 patients. of this population, 55% had primary gctb and45% had giant cell tumor recurrence, with 2% experiencing secondary recurrence.the results showed the effectiveness of denosumab in reducing the tumor size due to inhibiting the osteoclastogenesis. denosumab didnot show any effect on reducing tumor recurrence, but, in cases where complete tumor surgery isnot possible and tumor residuals may remain, denosumab can be helpful. also, the clinicians should consider therisk benefit of denosumab.