A 33-year-old male patient presented with lateral knee pain due to a posttraumatic valgus deformity. He had sustained femoral and tibial plateau fractures 25 years ago, treated with osteosynthesis. Subsequently, a valgus deformity with limb shortening developed. Clinical examination showed a limping gait, genu valgum and recurvatum with full range of motion, stable collateral ligaments and a positive Lachman test. MRI revealed grade II chondromalacia in the lateral compartment. A lateral open wedge high tibial osteotomy (HTO) was indicated for correction of limb axis and length, along with repositioning of the proximal tibiofibular joint. The postoperative course was uneventful with improved alignment and stable fixation. A second-stage slope correction is planned after bony consolidation in six months.

Keywords:Valgus deformity; High tibial osteotomy; Arciero technique; Posterolateral corner; Tibiofibular joint reconstruction

Abbreviations:HTO: High Tibial Osteotomy; LCL: Lateral Collateral Ligament; MRI: Magnetic Resonance Imaging