0:01

So now that we've established

0:02

that we can identify the anatomy, can we identify injury?

0:06

And I still think this is a work in progress.

0:09

This, uh, this article is now about four years, um, old.

0:13

And these are images straight from their article.

0:15

So this is supposedly an intact vertical fibers

0:18

of the Kaplan fiber system.

0:20

Here are those, um, horizontal, um,

0:22

vessels traversing the distal femur.

0:24

And here, supposedly this is an example of a torn,

0:27

and I put everything in quotations because between you

0:30

and me it's often hard.

0:32

We see a lot of edema back here.

0:33

And unless you see frank fiber disruption,

0:36

I think it real practice, it's difficult.

0:39

Again, pasted images from their article.

0:42

This, these are the vertical fibers

0:43

of the Kaplan fiber system

0:45

and supposedly this is intact and this is torn.

0:48

But you can see in both these examples, there's a lot

0:52

of edema in this kind of lateral

0:54

and posterolateral region of the knee.

0:55

So I think in practice's kind of hard, they did, um,

1:00

propose a classification system for identifying,

1:05

uh, Kaplan fiber injuries,

1:07

but there's really no validated MRI criteria for this, um,

1:12

for this type of injury.

1:13

And again, the problem I see when I'm trying

1:15

to look at this area is we'll see edema everywhere,

1:18

but it is important to know that this is, uh,

1:21

not inconsequential in terms of its association

1:24

with anterior cruciate ligament injuries.

Kaplan Fiber Injury

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0:01

So now that we've established

0:02

that we can identify the anatomy, can we identify injury?

0:06

And I still think this is a work in progress.

0:09

This, uh, this article is now about four years, um, old.

0:13

And these are images straight from their article.

0:15

So this is supposedly an intact vertical fibers

0:18

of the Kaplan fiber system.

0:20

Here are those, um, horizontal, um,

0:22

vessels traversing the distal femur.

0:24

And here, supposedly this is an example of a torn,

0:27

and I put everything in quotations because between you

0:30

and me it's often hard.

0:32

We see a lot of edema back here.

0:33

And unless you see frank fiber disruption,

0:36

I think it real practice, it's difficult.

0:39

Again, pasted images from their article.

0:42

This, these are the vertical fibers

0:43

of the Kaplan fiber system

0:45

and supposedly this is intact and this is torn.

0:48

But you can see in both these examples, there's a lot

0:52

of edema in this kind of lateral

0:54

and posterolateral region of the knee.

0:55

So I think in practice's kind of hard, they did, um,

1:00

propose a classification system for identifying,

1:05

uh, Kaplan fiber injuries,

1:07

but there's really no validated MRI criteria for this, um,

1:12

for this type of injury.

1:13

And again, the problem I see when I'm trying

1:15

to look at this area is we'll see edema everywhere,

1:18

but it is important to know that this is, uh,

1:21

not inconsequential in terms of its association

1:24

with anterior cruciate ligament injuries.

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

Kaplan Fiber Injury