Non-displaced Femoral Neck Stress Fractures in Young Adults: 7-Year Outcomes of Prophylactic Fixation Versus Nonoperative Treatment

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Retrospectively compare outcomes of prophylactic fixation to nonoperative treatment of incomplete or non-displaced femoral neck stress fractures (FNSF) in young adults. Outcomes of 82 patients (mean age 21.7 years) who were diagnosed with incomplete or non-displaced FNSFs from 2002 to 2015 were compared. Forty-one underwent prophylactic fixation; the remaining were treated without surgery. Fracture characteristics and complications were recorded. Pain scores, modified Harris Hip Scores (mHHS), and Hip Outcome Scores (HOS) were obtained and compared. The average fracture line in the operative group was 67% of the femoral neck width versus 18% in the nonoperative group (p < 0.001). There was no difference in outcome scores between the two groups. Prophylactic fixation of high-risk non-displaced FNSFs resulted in similar outcome scores to non-operative management of lower-risk variants at an average of 7.3 years follow up. No patient in either group progressed to a displaced femoral neck stress fracture. (Journal of Surgical Orthopaedic Advances 29(3):173–176, 2020) Key words: femoral neck stress fracture, non-displaced, Harris Hip Score, Hip Outcome Score

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Ryan C. Myers, MD; Grant K. Cochran, MD; Jacob E. Waldron, DO; Clarence E. Steele, MD; Bradley K. Deafenbaugh, MD; and Kevin M. Kuhn, MD

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