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Posterior Lateral Corner Injury

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Next, we have a 58-year-old bicyclist who was hit

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by a car 10 days, um, prior to the MRI.

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And he had a history of a prior partial men mastectomy,

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the medial meniscus.

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There's, uh, some signal here, um,

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and there's a small little para meniscal ganglion cyst,

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a large popal cyst here.

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And so it's diminutive.

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He, he had a prior partial menisectomy.

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The, uh, PCL has a high grade tear here.

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You can see that, uh, Humphrey, uh, does, um, uh, maintain,

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uh, it's still intact, Humphrey's intact,

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but the PCL has a

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quite a high grade tear.

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The ACL, um, also had a partial tear.

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You can see that the, uh, inter medial

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bundle looks pretty good,

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but the poster lateral bundle looks a little funny.

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Um, but on axials, you can confirm

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that couple slices down the poster lateral bundle, uh,

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has some increased signal.

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And so, um, I would read this as a partial tear of the ACL,

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but I would make mention

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that there's certainly intact fibers when we get

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to the postal lateral corner.

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There's, uh, a lot of abnormality.

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The long head of the biceps femoris,

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it looks like it was stripped off.

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Um, there's some, uh, of fibers of the short head

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of the biceps fems.

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Uh, these are the, uh, anterior, um, uh,

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attachments onto the tibia that remain intact.

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But there was also a posterior lateral corner injury.

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And I wanna show this

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because, um, he was conservatively treated

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and he did really well for quite a number

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of years, six years, uh, until he, uh,

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had an injury while skiing.

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And, uh, there was a whole host of, uh, abnormalities, uh,

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due to his skiing injury.

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But what I wanna show is how nicely the, uh, PCL had healed

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in the interval time.

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And so, Humphrey is, uh, is there,

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and the PCL, uh, basically reconstituted.

Report

Faculty

Donald Resnick, MD

Professor Emeritus, Department of Radiology

University of California, San Diego

Mini N. Pathria, MD, FRCP(C)

Division Chief, Musculoskeletal Imaging

University of California San Diego

Eric Y. Chang, MD

Adjunct Professor, Radiology

University of California, San Diego

Brady K. Huang, MD

Clinical Professor of Radiology

UC San Diego Medical Center

Tags

Musculoskeletal (MSK)

MRI

Knee