Medial Supporting Structures of the Knee
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Knee anatomy.
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Collaterals, the MCL.
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Let's start with the superficial layer,
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layer number one, also known, seen here labeled C, as the crus layer.
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And this might be a little bit confusing because this superficial layer,
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one of the pitfalls, includes something called the deep fascia.
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So don't get confused by that.
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Another potential confusing pitfall is the middle layer.
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It's called the superficial portion of the MCL.
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But more on that at another time.
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Let's look in the axial projection.
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So this would be anterior, this would be posterior.
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This is medial, this is lateral.
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Here is layer number one.
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It is formed by the deep fascia.
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And that deep fascia may receive some fibers from the patella retinaculum.
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Again, this is also called the crus or crural fascia.
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Immediately underneath it is a more
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condensed, thicker structure, which, in part, represents the medial
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patellofemoral ligament, a patellar stabilizer.
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And if you follow that back, it will eventually become the superficial
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middle layer or the superficial MCL, or middle layer of the MCL, or layer number
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two, what you might have called the tibial collateral ligament.
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So these two are contiguous and these two are contiguous.
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This one becoming layer number one, sitting on top of layer number two.
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So layer number one,
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the most superficial aspect of the MCL, which includes some retinacular fibers
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and something called the deep fascia, also known by the synonym as the crus layer
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or superficial crus layer of the MCL.
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
ProScan Imaging
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