0:00

Next case is a 38-year-old man with knee injury,

0:03

and this is meniscus case six,

0:06

scrolling from medial to lateral.

0:07

Again, you can see there's all this edema superficial

0:11

to the MCL complex.

0:13

When we get to the, uh, MCL, you can see

0:15

that both the tibial collateral ligament,

0:17

which is this structure here

0:19

and the posterior oblique ligament,

0:21

there should be this triangular shaped structure.

0:22

This is the central, um, this is the, the important central,

0:27

uh, portion of that, uh, uh, posterior oblique ligament.

0:31

And both, both of these are torn at the femoral attachment.

0:33

Just you can, uh, clearly see that on the, on the sagittal

0:37

as we go deep to those, you can see that there's

0:42

a much more obvious meniscocapsular injury than the

0:45

prior case I showed.

0:46

Uh, there's, there's a lot of irregularity.

0:49

Uh, you see the torn fibers in the meniscocapsular meniscal

0:52

tibial ligaments with all of his, all of his edema.

0:55

The EM knows mo semimembranosus tendon has

0:59

increased signal as well.

1:01

And this is a partial tear.

1:04

It's kind of an intrasubstance tear,

1:06

mostly involving the direct, uh, attachment of

1:09

that semimembranosus.

1:15

And as we go lateral,

1:19

you can see the, the PCL uh, looks okay,

1:22

but the ACL has a,

1:26

um, has a tear.

1:30

And as we get to the posterior, uh, ho uh, horn of

1:33

that lateral meniscus, uh,

1:35

there's some increased signal at this, uh, posterior root of

1:38

that, um, it lateral meniscus, but,

1:42

but it's not, it's not a high grade tear.

1:44

So at, at worst, it'd probably be a low grade tear.

1:47

And so this is just another ramp lesion.

Meniscocapsular Injury with Semimembranosus Tear

HIDE

Prev Next

Interactive Transcript

Pro Tip: Click on a word in the transcript to jump to that point in the video

0:00

Next case is a 38-year-old man with knee injury,

0:03

and this is meniscus case six,

0:06

scrolling from medial to lateral.

0:07

Again, you can see there's all this edema superficial

0:11

to the MCL complex.

0:13

When we get to the, uh, MCL, you can see

0:15

that both the tibial collateral ligament,

0:17

which is this structure here

0:19

and the posterior oblique ligament,

0:21

there should be this triangular shaped structure.

0:22

This is the central, um, this is the, the important central,

0:27

uh, portion of that, uh, uh, posterior oblique ligament.

0:31

And both, both of these are torn at the femoral attachment.

0:33

Just you can, uh, clearly see that on the, on the sagittal

0:37

as we go deep to those, you can see that there's

0:42

a much more obvious meniscocapsular injury than the

0:45

prior case I showed.

0:46

Uh, there's, there's a lot of irregularity.

0:49

Uh, you see the torn fibers in the meniscocapsular meniscal

0:52

tibial ligaments with all of his, all of his edema.

0:55

The EM knows mo semimembranosus tendon has

0:59

increased signal as well.

1:01

And this is a partial tear.

1:04

It's kind of an intrasubstance tear,

1:06

mostly involving the direct, uh, attachment of

1:09

that semimembranosus.

1:15

And as we go lateral,

1:19

you can see the, the PCL uh, looks okay,

1:22

but the ACL has a,

1:26

um, has a tear.

1:30

And as we get to the posterior, uh, ho uh, horn of

1:33

that lateral meniscus, uh,

1:35

there's some increased signal at this, uh, posterior root of

1:38

that, um, it lateral meniscus, but,

1:42

but it's not, it's not a high grade tear.

1:44

So at, at worst, it'd probably be a low grade tear.

1:47

And so this is just another ramp lesion.

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

Lesson

Meniscus (preoperative and postoperative)

Lesson

Meniscus Case Review

Lesson

Footprints and mechanisms of knee injury

Lesson

Cruciate Ligaments

Lesson

Knee Injury & Cruciate Ligament Case Review

Lesson

Medial Ligaments

Lesson

Lateral Ligaments

Lesson

Medial and Lateral Ligament Case Review

Lesson

Postoperative Ligaments

Lesson

Extensor Mechanism

Lesson

Popliteal Fossa

Lesson

Postoperative Ligaments, Extensor Mechanism & Popliteal Fossa Case Review

Meniscocapsular Injury with Semimembranosus Tear