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Distal & Proximal Intersection Syndrome

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0:01

These are two.

0:01

Just quick show and tell since we're done for the evening.

0:05

And um, lemme just get the history on this.

0:10

What is the history? I didn't bring my sheet.

0:15

Well, I know that I know what the history generally is.

0:18

I just don't remember the name and age and gender,

0:23

but the patient had dorsal radial sided pain.

0:27

Um, and this, this condition usually occurs

0:30

after a radial lister's tubercle fracture.

0:34

I've also seen it in athletes that do a lot of pronation

0:38

and, and supination.

0:40

Do you have the history on this one? Thank you.

0:43

This is 70 75. 75.

0:48

So this is a 60-year-old with pain in the hand

0:51

and dorsal radial aspect of the wrist with, with swelling.

0:55

It doesn't give you much information about the activity.

0:59

Um, the extensive reticulum is a bit thick,

1:03

but the process is really relegated around the EPL,

1:07

the extensor lysis longus compartment number three

1:11

as it goes over the back

1:12

or dorsal aspect of compartment number two,

1:16

the extensor carpi radiologist longus and brevis.

1:19

So it goes longest brevis. Longest brevis, and then longest.

1:23

So, longest brevis

1:25

and longest have collected together

1:27

to produce this focal area of inflammation.

1:30

This patient did not have a lister cubicle fracture,

1:34

so I suspect this is activity related

1:37

with thickening of the ulu.

1:39

And I wanted to show you one other one.

1:41

This is dorsal intersection syndrome, usually

1:44

between compartments three and compartment two.

1:49

And that can also occur in the forearm.

1:51

I think that's going to be 74. 76.

1:55

I was close like the trombones. There we go.

2:02

And something very similar occurs in the forearm

2:05

with the same, the same structures, uh, more proximally.

2:09

And here is your EPL

2:11

and there's your extensor carpi radialis long

2:14

and brevis with swelling in that, in that location.

2:17

So just something a little different to what your appetite,

2:20

uh, for the fingers tomorrow.

2:22

And we'll also be talking about entrapment neuropathy.

2:24

Any comments about these two quick cases?

2:27

Yeah, just the one comment that of these, you know,

2:30

one's proximal, ones distal, the proximal ones, something

2:34

to remember is that on the standard field of view,

2:37

you might not include this particular area in the forearm.

2:41

And so you may wanna consider if symptoms are that high

2:45

to extend the field of view

2:47

because, uh, I've seen a number of wrist exams

2:50

where you wouldn't be able

2:52

to diagnose this based on the field of view.

2:55

Well, you're, you're, you're so right.

2:56

And in my experience it's about 50 50.

2:59

Uh, I think more people, uh,

3:00

originally described the forearm intersection syndrome

3:04

and now people with MRI have recognized more frequently

3:07

that the hand intersection syndrome.

3:09

So I think, you know, they're both pretty evenly divided.

Report

Faculty

Stephen J Pomeranz, MD

Chief Medical Officer, ProScan Imaging. Founder, MRI Online

ProScan Imaging

Donald Resnick, MD

Professor Emeritus, Department of Radiology

University of California, San Diego

Tags

Musculoskeletal (MSK)

MRI

Hand & Wrist