Frequency of the Knee Posterolateral Corner Injury in Combination With Anterior Cruciate Ligament Injury

Objective: To determine the frequency of posterolateral corner injury in combination with an anterior cruciate ligament injury. Methodology: This Descriptive Cross-Sectional study was performed at Ortho Unit, MTI-Khyber Teaching Hospital Peshawar from 18 July 2020 to 18 January 2021. A detailed clinical history was taken followed by a general physical and systemic examination from all patients presenting with diagnosed anterior cruciate ligament tear on MRI. A plain radiograph of the involved knee was taken in sagittal and coronal planes to identify any fracture or dislocations and make necessary exclusions. The finally selected patients were enrolled and a specific data sheet purposely designed, was filled for each of them. A quick height, weight, and BMI (on Stadiometer and standard weighing scale) calculation were done and Beighton score was calculated for all patients. Results: Incidence of posterolateral corner (PLC) injuries was found in 36 (21.3%) patients combined with anterior cruciate ligament (ACL). Conclusion: It is of utmost importance to detect and treat the injury properly. As PLC injuries are not usually diagnosed in the first place, therefore, a thorough understanding of functional interactions of the PLC, specific history taking, and precise physical examination are required for the diagnosis and treatment.