MRI of posterolateral corner complex injuries of knee and why it should be included in reporting formats

Abstract

This is a retrospective study done in St John’s Hospital, Bangalore, India where MRI of all knee trauma cases between age groups 17 to 38 was evaluated retrospectively from November 2015 to February 2016. We got a total of 39 positive cases out which 18 cases had features of posterolateral corner injuries. Paediatric and older patients with advanced osteoarthritis were not included in the study. Out of 18 patients, the most common structure to get injured was fibulopopliteal ligament - 11(61.1%) and popliteus tendon / muscle - 11(61.1%) followed by posterolateral capsule and arcuate ligament complex - 10(55.55%) and Lateral collateral ligament - 7(38.8%).The most common associations were Anterior cruciate ligament tear 11 out of 18 (61.1%), followed by Meniscus 10 out 0f 18 (55.5%), Medial collateral ligament 2 out of 18 (11.11%), fracture of tibial plateau 2 out of 18 (11.11%)and tear of Posterior cruciate ligament, biceps tendon and patellar retinaculum 1 out 18 each (5.55%).