Abstract:[Objective] To investigate the clinical efficacy of pamidronate used for the treatment of osteofibrous dysplasia (OFD) . [Methods] A retrospective study was performed on 38 patients who received pamidronate intravenously for OFD in our department from Jan- uary 2011 to January 2021. [Results] Fever occurred in 1 patient at the time of first medication. Pathological fractures occurred in 5 patients during the treatment period, which in 4 patients underwent curettage, bone graft and internal fixation, while the other one received intramed- ullary nailing for internal fixation only. With time of follow- up lasted for 12~48 months with a mean of (30.79±13.03) months, the VAS scores decreased significantly (P<0.05) , while the SF-36 score increased significantly (P<0.05) ; in addition, serum C-terminal type I pro- collagen (C1NP) and serum N-terminal propeptide of type I procollagen (PINP) significantly decreased (P<0.05) , whereas the serum osteo- calcin remained unchanged (P<0.05) . Compared with that before treatment, the lesion area on radiographs reduced in 3 patients, remained unchanged in 32 patients, and enlarged in 3 patients at 6 months after treatment, whereas reduced in 7 patients, unchanged in 27 patients, and enlarged in 4 patients at the latest follow-up. [Conclusion] The pamidronate used for the treatment of OFD does relieve pain, decline bone metabolic markers and delay the progression of the disease with mild adverse reactions.