Acute Correction of Leg Length Discrepancy and Severe Femoral Malalignment: A Case Report.

INTRODUCTION: Approximately 70% of the population have a leg length discrepancy, with 2 cm being the threshold for surgical treatment. Although there are reports of patient outcomes after incremental leg-lengthening, there is a paucity of data regarding acute lengthening procedures. We present a unique case of acute leg lengthening and correction of severe malalignment in an adult patient after femoral malunion treated with multiple modified Sofield-Millar osteotomies and intramedullary nailing, a technique that has only previously been performed in pediatric long bone deformities. To the author's knowledge, there have been no previous reports of acute lengthening in an adult patient to correct for such a severe deformity in a single operation.

CASE REPORT: A 48-year-old woman with a 35-year history of a right femur fracture malunion presented with a 5 cm leg length discrepancy and severe malalignment associated with pain and ambulatory dysfunction. Multiple modified Sofield-Millar osteotomies followed by placement of an intramedullary nail were performed and resulted in successful acute correction of limb length discrepancy and anatomical alignment. There was a complete union of bone with callus formation at osteotomy sites at 9 months postoperatively, and the patient reported minimal pain and improved ambulation. The patient was followed for 2 years postoperatively and experienced an improvement in ambulatory function with no pain. No post-operative complications were observed.

CONCLUSION: Multiple modified Sofield-Millar osteotomies with intramedullary nailing were utilized for successful acute correction of limb length discrepancy and severe malalignment with improvement in pain and ambulatory function in this case of femoral leg length discrepancy in an adult patient.