Pes anserinous specifically semi membranous and hamstrings also help the posteromedial corner stability ( 5- 7). Superficial MCL, the largest structure, Posteromedial capsule (PMC) and it’s thickening that is often referred as posterior oblique ligament (POL), and deep MCL as the thickening of joint capsule play an important role in stability of the medial side of the knee. There are multiple soft tissue structures in medial side that play an important role in relation to each other to retain medial side stabilization and resist against valgus forces. Knowing the MCL anatomy makes it much easier to understand the patho anatomy and choosing the right method of treatment weather conservative or surgical, based on clinical examination and MRI findings to achieve a stable knee with near normal function and return to pre-injury level of activity as soon as possible. The complex anatomy of this region has led to difficulty in planning with a standard algorithm for treatment ( 4). However, medial side injuries are heterogenous. The ideal outcome would be a stable, pain free knee with good range of motion. Restoration of function and going back to the pre-injury level of function is the aim of treatment in ligament injuries of the knee. If not well diagnosed and treated, might end up with persistent instability, pain and loss of function ( 2, 3). ![]() MCL injury occurs either in isolation or together with other knee ligaments such as O’Donogou unhappy triad or knee dislocations. ![]() This injury mostly results from a valgus force in sport events, motor vehicle accidents or fall from height ( 1). Medial collateral ligament (MCL) injury, is one of the most common ligament injuries of the knee.
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