Abstract
We report an unusual case of anteromedial tibial plateau compression fracture following
hyperextension and forced varus of the knee, resulting in an anterior bone fragment
large enough to require osteosynthesis. This uncommon lesion was associated with posterolateral
complex injury, diagnosed with magnetic resonance imaging (MRI), while both cruciate
ligaments were preserved. After proceeding with tibial plateau osteosynthesis, a peroneal
tendon allograft was used for supplementation repair of the lateral collateral ligament
and biceps tendon in a single surgical intervention. Tibial plateau fractures are
often associated with soft-tissue involvement, mainly of the anterior cruciate ligament
and external meniscus. Posterolateral complex injuries also occur with a mechanism
of forced varus and hyperextension. These lesions require an accurate diagnosis to
avoid future knee instability; moreover, adequate treatment in the acute phase provides
a better functional outcome. Physicians should suspect associated posterolateral complex
injury when an anteromedial tibial plateau fracture is diagnosed. MRI allows adequate
diagnosis and permits surgical treatment in one procedure.
Keywords
medial tibial plateau fracture - allograft supplementation - anteromedial compression
- posterolateral complex
