Fixed Flexion Deformity due to Displaced Hoffa Fracture: A Case Report.

INTRODUCTION: Hoffa fractures of the femoral condyles are rare, especially in the pediatric population. A Hoffa fracture causing an acute fixed flexion deformity has never been described in literature. CASE REPORT: A 14-year-old girl sustained a complex Hoffa Fracture of the lateral femoral condyle of her left knee, which caused acute locking of the patella distal to this fracture and subsequent a fixed hyperflexion deformity. After radiological imaging, this fracture was closely reduced in the operation room. Four days after trauma, the fracture was arthroscopically treated with 2 headless compression screws. CONCLUSIONS: Urgent recognition of Hoffa fractures is of utmost importance. Quick and adequate evaluation and surgical treatment of these fractures improve the return to normal activity level and decrease the complications.