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Wk 1, Case 1, Knee MR - Review

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0:00

So the first case, it was a 72 year old male with, uh,

0:05

anterior pain with squatting. Okay? And first off,

0:10

I actually probably spend the most time on localizer sequences. Uh,

0:15

I love anatomy, but as we all know,

0:17

the localizer sequences are typically larger field of view. And,

0:21

uh, I, you know, I catch some, some things sometimes, uh,

0:26

incidentals that may or may not be pertinent to, uh, the patient's presentation.

0:32

But, uh, sometimes we do catch a rare cancer. So I do like to, uh,

0:36

look at the localizers. And funny thing, I,

0:39

I tend to spend a little bit more time, uh, sometimes on that, especially on,

0:43

um, pelvises and what have you, or spines. Okay. But, um,

0:48

moving right along. Uh, I am a structural sort of person. Okay?

0:53

I, I did not grow up, uh, unfortunately, uh,

0:56

back in the day when we still hung films.

0:59

So the older staff I've noticed that I've worked with, they tend to, um,

1:04

look at the images by planes, and they, they, so,

1:07

so they look at all the structures on one plane.

1:10

So they'll work through from far posterior, far anterior on, on a coronal,

1:15

let's say, starting with the patella, and then work their ways all the way back.

1:19

Okay? But the way I do things, and I've been asked this before, and just,

1:24

just to get that, uh,

1:25

get this outta the way right from the start and for future, um,

1:29

discussions and, uh, office hours or my office hours, um,

1:33

I tend to divide all the joints into a few broad categories.

1:38

Okay? I do ligaments, tendons, joints,

1:43

ancillary stuff to the joint, okay? Uh, soft tissues, muscles,

1:49

and, uh, bone morphology and marrow signal. So that's my checklist.

1:52

So you can sort of get a sense that I'm a structural sort of person.

1:56

I like to look at each structure in each plane, be it, you know, uh, you know,

2:01

so, so for instance, to extrapolate that checklist out to a knee,

2:06

if I were dictating a stone cold, normal knee, my ligaments,

2:10

for lack of a better term, sorry, I, I start with the menisci, though,

2:14

obviously the medial and lateral menisci.

2:16

And then along with the ligaments I do next, the cruciate ligaments.

2:19

My next on the checklist is the medial and lateral supporting structures. Okay?

2:24

Those, those, uh, obviously are capsular ligaments. And as, as,

2:27

as some of you may know, medial, medial medially and laterally, the capsular,

2:32

uh, the, the ligaments about the knee are divided into about three layers. Okay?

2:37

Um, I noticed in some of your checklists, you use tibial collateral,

2:40

ligament fibular, collateral ligament, what have you. That's fine.

2:43

Lateral collateral, ligament, just stay.

2:45

I just ask that you stay consistent between your terminology, especially when,

2:49

when talking to your clinicians, you know, talk to your clinicians,

2:52

see what terms they use so that you're, you guys are communicating effectively.

2:56

Okay? Next on the, the, the checklist for the knee, I,

3:00

I go from media lateral supporting structures. I go to the, um,

3:05

extensor mechanism and fat pads, then sliding right into the joints.

3:09

I look at joint alignment, the amount of fusion, whether they're synovitis,

3:14

pase, particularly media superior pika, which are the most common. Okay?

3:19

Then I look at the cartilage, starting at the patella femoral compartment,

3:22

and then the median lateral femoral tubal compartments.

3:25

Then I check for popal cysts. Okay?

3:28

And then finally I wrap up with soft tissues, muscles, bone, morphology,

3:32

and marrow signal. Okay? So just before we get into the case,

3:36

just to fly through that real quick, okay? Um,

3:39

so if I were looking at this case, I'd look at the menisci, okay?

3:42

Just scrolling through real quick. Um, you know,

3:45

on the sagittals and coronals, that's gonna be key for me.

3:48

Then I look at the cruciate, okay? While I'm on my sagittal,

3:52

I will actually jump back to the coronals, okay?

3:55

And I also like the axials for the cruise ships as well, especially for the ACL,

3:59

because the ACL, uh, depending on who you read, okay,

4:03

is divided into two bundles, right? Uh, AMPL is the pneumonic.

4:07

I teach my trainees and your medium posterior lateral, uh, bundles, okay?

4:11

So I find that the axials are better to, uh, better, um,

4:17

show a partial terror, particularly of one, one or, or other of the bundles.

4:22

But mind you, mind you, okay, groups out of Pittsburgh,

4:25

they're actually doing fancy computer aided, um,

4:28

studies where they've actually identified up to 11 or 13 bundles.

4:33

And for those that are interested in knee and AACL reconstructions,

4:36

while you're studying, you may run into the what's been turned,

4:40

the double bundle technique where they take parts of where, wherever graft from,

4:45

wherever, and they loop it over, and they, they, they, they, uh,

4:48

double it over on itself.

4:50

So now what some people are doing are double and triple bundles, or even a,

4:55

um, uh,

4:57

increasing the number of bundles to make things more anatomic. But granted,

5:02

once you tear an ACL, you re you're really never gonna be the same. Okay?

5:07

So right after the ACL, obviously I go to the, the PCL. Okay?

5:12

Next, I, what I find, uh, is the medial and lateral supporting structures,

5:17

and the reason why I call it a medial and lateral supporting structures,

5:20

and what I've been trained by my mentor and now colleague, Dr. Resnick,

5:23

is because of the different layers, okay?

5:26

So walking probably the more important things, okay?

5:30

The second and third layers, okay?

5:31

That is gonna be the tibial collateral ligament, okay?

5:35

And the deep medial meniscal femoral,

5:37

and the deep medial meniscal tibial ligaments, or AKA, the coronary ligament,

5:42

walking a little bit more posteriorly, okay? Sorry,

5:47

my laptop is little, okay? We have the posteriorly ligament, okay?

5:51

And then obviously we have, you know, starting to get into the OPLL,

5:55

the semimembranosus tendon, and all of its arms, okay?

5:59

And obviously the posterior joint capsule,

6:01

walking around the posterior joint capsule and coming back from posterior to

6:06

anterior, okay? Looking at the lateral supporting structures, okay?

6:10

I look at the pop fib ligament, okay? Probably, uh,

6:15

apologies. So this right here,

6:19

okay? This little band right here, the pop lidio fibular ligament, okay?

6:24

Then we have the pop lius tendon, then obviously the biceps pems.

6:28

And if you read the literature, there's about three or four insertions. Um,

6:32

but the majority of them are going to happen, uh, at the, uh, the fibula,

6:36

obviously the, the lateral aspect of the proximal tibial epiphysis, okay?

6:41

Coming out more, uh, anally than now.

6:43

We have what's been termed in the popular literature,

6:46

the anterolateral ligament, okay? And that's what,

6:50

when that tears or pulls off a piece of bone that's been called the, uh,

6:55

sagon fracture, we know it better as a sagon fracture. Okay?

6:59

And then now mind you too, the, the proper term, uh,

7:02

even though the pop culture or the popular news has coined this as the

7:07

anterolateral ligament, it's,

7:08

it's better known as the mid third lateral capsular ligament. Okay?

7:13

That's the original term. But, uh,

7:15

people in the popular literature have been trying to, um,

7:19

show that this is a new ligament, but it's actually not.

7:22

And we've actually written about that for those that are interested.

7:25

Skeletal radiology a couple years back. Okay? And then finally,

7:28

obviously you have wisp of the, that biceps femme, but far anteriorly, okay?

7:34

The main insertion of the IT band or the ileal tibial band distally is gonna be

7:38

at gertie's tubercle, but recent literature, um, is, uh, and also review,

7:43

nice review article in skeletal radiology. Um, and please feel free, you can,

7:48

you can, um, uh, reach out to me via email, Olivia and the others can,

7:52

can direct you. But, and I'd be happy to share some of these PDFs or,

7:55

or citations with you. But, uh,

7:58

relatively recent literature has shown that the it band actually has five

8:01

insertions,

8:02

but the main important one is gonna be at the gerdes tubercle right here.

8:05

So that takes care of the medium lateral supporting structures, okay?

8:10

Moving right along and, and sort of going into our case and, and we'll go,

8:13

come back to the findings in a bit, but moving right along to my next c check.

8:17

Uh, next thing on the checklist is gonna be the extensor mechanism, okay?

8:20

And that's obviously gonna be the quadriceps, which consists of the VA triplets,

8:24

vass medias, intermediates and laterals,

8:26

and the rectus fous bar anteriorly inserting upon the patella and the

8:31

quadriceps, uh,

8:32

pre patella p plate or what some people also call the patella quadriceps

8:37

continuation written originally in the radiology literature by Dr. Resnick,

8:41

okay? And Dr. W back in, I think it was 2009 ish or something like that,

8:46

a nice cric study in AJR for those that are interested. And that, uh,

8:51

continuing on the patella tendon, obviously, which inserts upon the ligament.

8:55

Now, some of you, I've noticed, have called this a, um,

8:59

a patellar ligament or even a quadriceps ligament. That's fine, right?

9:03

It's bone, bone to bone, you know, it's gonna be a ligament. So again,

9:07

I just ask, you know, just know what your clinicians are using,

9:11

and I kind of just dictate to what the clinician is, is used to hearing.

9:15

I'm fine either way, calling it tendon or ligament,

9:18

especially when obviously it was between bone and bone. Next, I check the, the,

9:22

the fat pads, okay?

9:24

And the three or four fat pads that I like to check on a knee are gonna be the

9:27

pre femoral fat pad, which is right here, the super patellar, uh, fat pad,

9:32

the hoffa fat pad, and then the paraship fat pad. Okay?

9:36

Depending on who you read the super patellar fat pad,

9:39

when EMS can be problematic, some people believe in it, some people don't. Okay?

9:43

Pre femoral fat pad, you really don't see any problems here.

9:46

Usually the ones that I really pay attention to are Haas fat pad,

9:50

where you see the, uh, the edema,

9:52

particularly sup laterally with patella mal tracking,

9:56

but you can also see it in things with Haitis, okay? Uh,

9:59

originally described by our group back in the, uh, I think the two thousands,

10:04

or maybe late nineties, especially with HIV patients, they can get haitis.

10:09

Okay?

10:10

The other thing that they can get and more recently written about is PeriShip

10:13

fat pad edema, okay? And then th this,

10:16

basically this fat pad right here in between the tendons, or sorry,

10:20

the ligaments here, it is an intraarticular, extra synovial structure,

10:25

okay? Can get inflamed, particularly with patients that like to bend the knee.

10:29

So a lot of, we get this in a lot of soccer players, okay?

10:34

So peri cruciate, fat pad edema. All right? So that's my, uh,

10:39

so just to backtrack real quick, so menisci cruciate ligaments,

10:43

medium lateral poring structures, extensor mechanism, fat pads.

10:48

Now the joint, I look at the joint, I look at the alignment, okay? Granted,

10:52

it is a static image, okay? We're not gonna, you know,

10:54

we're not doing the physical exam, but sometimes, especially with a, uh,

10:58

anterior cruciate ligament tears,

10:59

we're obviously gonna see that anterior translation of the tib with respect to

11:02

the femur, with uncovering of the menisci. Right? Next I check the, uh,

11:07

cartilage, starting with the patella femoral compartment, then using, uh,

11:11

and I evaluate that with axials and sagittals, that compartment.

11:16

And for the coronal, uh, sorry for the, um, for the, uh,

11:20

medial and lateral femoral tubal compartments, I like to obviously use the, um,

11:24

the sagittals and coronals. I will, however, use the axials,

11:28

especially for these far posterior, uh, con or lesions, you know, um,

11:33

sometimes, you know, we miss a little far, uh, posterior lesion.

11:37

And some of my, um, some orthopedic literature will say, you know,

11:42

if we don't mention it, they will miss it,

11:44

because they won't get the scope all the ways back there,

11:47

or entirely flex the knee to try to get back there. Okay? Next,

11:51

along with the joint, I look for the Popal cyst, and I harp,

11:55

I harp on my trainees here at UCSD to make sure that the neck comes out between

12:00

the m and m muscles, that is the medial gastroc anemia, and the semimembranosus,

12:05

uh, muscle or tendon. And that is the direct arm here, okay?

12:09

Depending on who you read, there are actually about six or seven attachments,

12:13

okay? Or arms of these emin ss tendon. But here, for this purposes,

12:18

I'm talking about the direct arm, which inserts upon the, uh,

12:21

posterior aspect of the, uh, uh,

12:25

medial tibial, uh, pip proximal, medial tibial pips right here. So this as,

12:30

in this case,

12:31

this is where you want to see the neck of the Pope cyst arising from,

12:35

from the medial gastroc anus,

12:37

from in between the medial gastro anus and the semimembranosus muscle,

12:41

or the m and m muscles, kind of like the candy. Okay?

12:44

If you don't see that neck there, then you gotta worry about something else. Um,

12:48

uses neoplasm, a ganglion cyst, what have you, something like that. Okay?

12:52

Something more, potentially more ominous,

12:54

especially with the mus neoplasms or potentially, let's say a synovial sarcoma,

12:59

right? All right. So finally,

13:01

the last few checks I have are for any incidentals.

13:04

I look for any muscle anatomy, uh, variance,

13:07

particularly third head of the gastric anemia muscles,

13:10

which typically will arise right here, can, can, uh, uh, uh,

13:14

lead to popliteal artery entrapment syndrome if you believe in that.

13:18

Other things I look for are, uh, accessory plant terrace,

13:22

which is thought to contribute potentially to it band prien syndrome.

13:25

And another thing I also look for, especially if someone's going for, let's say,

13:29

a high tib osteotomy, or they have really overt degenerative changes,

13:33

I look for an abberant, anterior TBIs artery, okay?

13:37

Which is depending on who you read, seen in, in the knee,

13:40

about 2.1% of the time, that's according to an article from the,

13:45

the American Journal of Sports Medicine.

13:46

And basically it's a little early takeoff of the angio tibialis artery that

13:51

interposes itself between the posterior aspect of the tibia and the populous

13:56

muscle right here. So you would see it right here.

13:59

Why is that important to mention?

14:00

I've actually been involved in a couple of cases right now, not me personally,

14:04

but testifying that, uh, the, that artery was missed.

14:09

Surgeon went in, it was Nick,

14:11

and the patient later went on to bleed out and got compartment syndrome.

14:15

And obviously the, the problems with that. So if you do see, uh,

14:19

an anterior an an aberrant anterior anterior TBIs artery, I would,

14:24

I would highly suggest, uh, uh, mentioning it in your, uh,

14:28

in your findings at least, if not in the impression, especially,

14:31

especially if the patient is planning to go for, you know, uh, surgery, um,

14:36

a high tibial osteotomy, knee replacement, what have you.

14:40

So something to be aware of. And finally, lastly, I like to look at the,

14:45

uh, bones, uh, bone, uh, bone morphology and marrow signal,

14:49

and obviously I like a nice T one for that. Okay, so going back to our case.

14:54

Okay. Uh, sorry,

14:55

any questions on how I kind of approach a knee before we jump into the

15:00

actual case or the first case?

15:04

Well, you, you talk about the complexity of structures,

15:06

especially in the postal lateral corner in the EM prognosis,

15:09

having multiple attachments.

15:12

Is it crucial to identify each of these attachments and structures,

15:15

these small structures?

15:18

I would say not, not really, sir. Uh, great question. I, I,

15:21

I think that was coming from Hari. Great question. Uh,

15:24

I'm happy to provide that, uh,

15:25

literature for literature to you if you're interested. But really, I would say,

15:30

uh, in my experience, the big things are going to be identifying the, the, uh,

15:36

the, uh, direct head. Okay? This one right here, okay.

15:41

Or sorry, the direct arm of the semiosis, which obvious, uh, oftentimes,

15:46

uh, gets, uh, degenerated tendon otic or partially torn.

15:50

And I would say the other arm that I would, uh,

15:53

like to know about is the, uh, anterior arm,

15:57

which is this arm right here,

15:59

which inserts upon the lateral aspect of the proximal tibial epiphysis. Okay?

16:04

And if you view it on a sagittal, it's actually been likened to, uh,

16:08

a hockey stick. Okay? And why is that important? This,

16:12

this arm is important. It's right here, okay? And going back to our coronal,

16:17

it's right sort of, uh, here, this sort of thin structure right here,

16:22

it, it can become tendon otic, and sometimes people will come in,

16:27

say, uh, with a rule out mass, and it just turns out to be a really tendon otic,

16:32

uh, long, uh, sorry, anterior arm of the semimembranosus tendon. And,

16:37

uh, it is been confused for, um, a mass, for instance, like, uh, you know,

16:41

tens synovial, giant cell tumor, focal type intraarticular,

16:45

or even like gout or something like that. So those,

16:49

those are in my experience, are probably the two more important arms to,

16:53

to think about for the, uh, the posterior medial corner here.

16:58

So it's interesting to, to,

16:59

to find out that it's actually 11 bundles within the ACL.

17:03

Yeah, yeah, yeah. There's, there's up to 11 or 13 now and stuff like that. And,

17:08

and as you'll see during my office hours, and I'll point out the, the more,

17:13

the more I study, at least the more I find out I, I, I, I have more to learn.

17:17

So, but that's why, that's why we do this, right?

17:21

And the

17:23

Anterior posterior bundles of the, um, ACL,

17:27

how do you identify that?

17:28

Uh, just where they insert, right? So the anter medial is just,

17:32

is just gonna be more anterior and medially located,

17:35

and the posterior lateral is just gonna be post, uh, insert, uh,

17:37

sort of post more posterior and lateral. And if you think about it, right,

17:41

the cruciate ligaments and pretty much everything, even the meniscal,

17:46

meniscal ligaments right,

17:47

are named for its insertion upon the tibia more anteriorly,

17:52

if you want to think of it that way. Okay?

17:56

So going right to the case. Okay? So,

17:59

so now that I've shown you how I kind of approach a case, that being said,

18:04

okay, besides looking at the localizer and the, uh,

18:08

my sequence or structural analysis,

18:12

I do initially open up every study, um,

18:16

looking at, uh, usually AT one and a fluid sensitive sequence. Okay?

18:21

And that just gives me a flavor of the case, okay?

18:23

Just where to direct my eyes and where I,

18:26

I figure I'm gonna direct most of my intention, okay? And in this case,

18:30

in our 72 year old male with problems squatting, what we see here, okay,

18:35

we will go from proximal to distal, okay? The quadriceps tendon, uh,

18:39

some of you may have called, um, some tendonosis, that's fine,

18:43

maybe even a little bit tearing.

18:45

But what I wanna highlight is the quadriceps can look quite striated,

18:49

sort of almost like a step celery stock that we see with the ACL. Okay?

18:53

I like to see a lot of edema. I like to hear that,

18:56

that history of anterior knee pain if possible too as well. Okay?

19:00

But continuing distally part of the extensor mechanism or the heart of the

19:04

extensor me mechanism, what we see here is a really emus okay,

19:08

or patella with osteo, right?

19:11

Without any good history and any other good, uh, other findings to corroborate.

19:16

Yeah, you can think of contusion if there's an ulcer, you know, you could,

19:19

you could start thinking about osteomyelitis,

19:22

septic arthritis with pre patellar bursitis, what have you.

19:25

But going more distally, we've noticed that the quadr, uh,

19:29

pre patellar quadriceps, uh,

19:31

continuation or what some of you have termed the, the pre patellar plate,

19:36

okay? We, uh, know this, okay,

19:38

as basically a chondro,

19:41

a pope zone, okay? And I kind of think of it like,

19:46

um, I love sweets, okay? And I love baklava. Okay?

19:51

I don't know if you guys have baklava before or like, uh,

19:53

croissants or fine pastries. It's, it's multiple,

19:56

it's actually multiple layers and bursa overlying this, uh,

20:01

anterior patella, and I always have to look it up.

20:04

There's like a subcutaneous bursa, a subfascial bursa,

20:08

and a three or four more, more bursa. But you can look it up in the literature.

20:13

But what can happen is with injuries, this is, this can actually tear,

20:16

or as in our case, okay,

20:18

we have a little bit of enthesopathy perhaps from the tugging,

20:22

the pre patella quadriceps.

20:24

This entire plate is sort of dispersing or helping to disperse the force

20:29

of that quadriceps and patella tendon across the Accenture mechanism, right?

20:33

Think of this patella as basically a pulley, right?

20:36

Providing more mechanical advantage to our extensor mechanism,

20:41

allowing us readily ready or easier extension, okay?

20:45

Between the, uh, of the lower extremity, obviously. But in this case,

20:49

this patient obviously has osteitis or reactive edema,

20:53

some enthesopathy, some stripping,

20:55

and some arguably low grade or some partial tearing of that pre patellar plate

21:00

or the quadriceps continuation. And then more distally,

21:03

it cuts into the sort of interstitial deamination delaminating sort of

21:08

tear of the proximal teller tendon superimposed upon, um,

21:12

tendinopathy. I used to grade tendinopathy and sort of,

21:16

sort of differentiate tendinopathy, but after talking to a lot of my surgeons,

21:20

they don't mind if I don't, uh, sort of, uh,

21:25

better classify or come down hard on the typical, the,

21:28

the exact type of tendinopathy you may hear terms of such,

21:31

such as hypertrophic, uh, degenerated, fatty,

21:35

replaced calcific ossific, you know, sometimes even, you know,

21:39

you can have crystal deposition or fatty deposition in, in some tendons,

21:43

what have you. Um, but I just say tendinosis. Some, some of my surgeons, yes,

21:48

they like measurements. So in this case, I would maybe measure the,

21:53

not only the AP thickness,

21:55

but the cranial coddle thickness as well and just really try to be specific.

21:59

But this does fall in the realm, okay, of, uh,

22:03

arguably attraction apophysis. Okay? And someone older, if, sorry,

22:08

if it was a very young patient, uh, uh, a,

22:11

a little kiddo where the patellar, uh, um,

22:14

the epiphyseal cartilage is not yet mature,

22:16

you get the patellar sleeve evulsion fractures, okay?

22:20

But as they get older, and at the proximal uh, end,

22:24

we're gonna worry about jumper's knee,

22:26

but basically you can think of them as traction of pope or traction sort of

22:30

injuries across the Accenture mechanism. If you have it happening more distally,

22:35

then that's gonna be that classic SLJ or syn larsson johanson, uh,

22:40

syndrome for those that like eponyms, okay? And,

22:42

and obviously a little bit younger, you're gonna have, especially when you have,

22:46

uh, typical tubercle edema and uh,

22:49

oif osci fragmentation of the tibial tubercle,

22:52

then that's gonna fall in the realm of os Oscar slaughter's disease.

22:55

But I sort of think of these, uh, injuries as a continuum,

22:59

much older patients, especially if they have bilateral disease.

23:03

I'm gonna start thinking of systemic disease processes, right?

23:06

Whether it is renal failure, diabetes, what have you, uh, maybe, you know,

23:12

rare medications, but as we know, medications,

23:14

especially fluoroquinolones has typically been described with your achilles

23:18

tendon tears. But that, uh,

23:19

and that we may see that in another course if you guys are with us. Okay?

23:24

So this just a, just a nice case within the realm of jumper's knee,

23:28

but also some nice, uh, tearing or stripping of the, uh, uh,

23:32

patellar quadriceps continuation. Okay?

23:35

And you can see that obviously too nicely on our axial sequences.

23:40

Again, coming from proximal to distal, we see some of that quadriceps, uh,

23:45

tendinosis, maybe even little foci of tearing out medially there,

23:50

going out, uh, more distally, we see that abnormality,

23:53

that enthesopathy and osteitis underneath that patella's quadriceps

23:57

continuation,

23:58

we see some of that uplifting of the three or four layers of the bursa anterior

24:03

to the patella bone and more distally, we see that, uh,

24:06

partial mainly intrasubstance hearing of the patellar tendon. Okay.

24:12

Questions on this case.

24:15

Is this commonly seen in racket spots, uh, particularly with tennis players?

24:20

Uh, I, I have seen it. I have, yeah, I have seen it. But here in, uh,

24:25

San Diego, I typically see it more with, uh,

24:28

basketball players and volleyball players.

24:31

So what are the treatment adjuncts for that?

24:34

You know, I i, I don't know the, the, uh,

24:38

treatment adjuncts for that. Um, but um,

24:44

I think I,

24:46

I have been asked at times to like inject, um, you know,

24:51

steroids if, you know,

24:52

to see if that's like a pain generator or lidocaine at times under ultrasound.

24:57

But more often than not, I, I would say, um,

25:03

I would say definitely repaired when the rest of the, uh,

25:07

other components of the extensor mechanism are involved.

25:10

But I have not in my, uh,

25:13

experience or anecdotally seen a surgeon go in just to fix that, uh,

25:18

quadriceps continuation.

25:21

And certainly there's some controversy with, uh,

25:23

corticosteroid injections because they tend to cause weakening and possibly even

25:28

tears in the future.

25:29

Yeah, I, I think I, and, and depending on who you read too, um,

25:36

a long term, and there's a, there's a couple recent articles.

25:41

Longer term,

25:42

if you follow some patients out tendon tears at the hips and or

25:47

tendonosis and tendinopathy, long-term, um,

25:51

what they found is long-term steroids may be detrimental.

25:57

'cause it does, as you had mentioned,

25:59

lead ultimately to tears and what have you.

26:02

And it sort of accelerates the process, some of my colleagues and,

26:07

and listening to authors at various, um, meetings.

26:11

Some people believe that, um, you know, we are just treating friction with,

26:16

you know, saline, lidocaine or steroids. But, um,

26:20

I have not heard of a good, uh, prospective study. Uh,

26:25

I, I, that would be a nice thing to do. Just, you know,

26:28

in do a sham injection where someone's getting, um,

26:32

no injection, uh, maybe lidocaine, um,

26:37

uh, maybe lidocaine saline or just saline injections and then, you know,

26:42

steroid injections and just see longer term what, uh, um,

26:47

how these patients do in the various, um, uh, you know,

26:51

in with these various injections in, in various locations. I, I'd,

26:55

I'd really be interested to, to see that. Yeah.

Report

Patient History
72M anterior pain with squatting

Findings

Cruciate ligaments: ACL and PCL are intact.

Medial compartment: Fraying of the outer edge of the posterior meniscal horn without frank meniscal tears. Focal penetrating chondral fissure with a tiny subchondral arthropathic cyst and nominal osteoedema at the anterolateral aspect of the medial femoral condyle (class 4 chondromalacia). No osteochondral defects. No osteoarthrosis. Intact medial collateral ligament.

Lateral compartment: Normal meniscus. No chondromalacia, osteochondral defects or osteoarthrosis. Intact lateral collateral ligament complex.

Anterior compartment: No patellofemoral dysplasia. Class 2 chondromalacia. No osteochondral defects or osteoarthrosis.

Proximal tibiofibular joint: Normal.

Extensor compartment: Mild tendinosis of the distal quadriceps tendon.

Severe confluent hypertrophic patellar tendinosis with interstitial splitting/delamination reaching the superficial fibers of the proximal patellar tendon.

Tiny traction enthesophytes of the anteroinferior patellar pole with a focal cortical breakthrough and diffuse reactive patellar osteoedema.

Patellar plate delamination with mild prepatellar bursitis. Diffuse reactive anterior soft tissue swelling.

Induration of the Hoffa's fat pad with diffuse edema.

Small joint effusion. No internal debris or free bodies.

Flexor compartment: Mild fluid distention of the gastrocnemius/semimembranosus bursa without dehiscence. The rest of the flexor mechanism and neurovascular bundle are normal.

No soft tissue masses.

Impressions
1. Severe confluent hypertrophic patellar tendinosis with interstitial splitting/delamination reaching the superficial fibers of the proximal patellar tendon in keeping with “jumper's knee”.

2. Tiny traction enthesophytes of the anteroinferior patellar pole with a focal cortical breakthrough and diffuse patellar osteitis.

3. Patellar plate delamination with mild prepatellar bursitis and diffuse reactive anterior soft tissue swelling.

4. Reactive edema in the Hoffa's fat pad. Small joint effusion.

Case Discussion

Faculty

Stephen J Pomeranz, MD

Chief Medical Officer, ProScan Imaging. Founder, MRI Online

ProScan Imaging

Gitanjali Bajaj, MD

Assistant Professor

University of Arkansas for Medical Sciences

Edward Smitaman, MD

Clinical Associate Professor

University of California San Diego

Brian Y. Chan, MD

Assistant Professor of Musculoskeletal Radiology

University of Utah

Todd D. Greenberg, MD

Radiologist

ProScan

Tags

Musculoskeletal (MSK)

MRI

Knee