Interactive Transcript
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<v ->Dr P. Here.
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Here's a 41-year-old with pain
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and decreased range of motion.
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Let's do a little review
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before we delve into this next SLAP lesion,
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which is known as a SLAP VIII,
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which means we're entering
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the Modarresi classification systems.
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So quick review of the classification systems.
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You've got your pear-shaped glenoid,
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and we've got a little ridge up top here,
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the superior tubercle of the glenoid right there.
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And we said that the biceps is going to take off
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from the superior tubercle of the glenoid posterior to it,
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and sometimes with a little bit of it on top.
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And this is how the takeoff is in about 56% of individuals.
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About 20, 25, 30% it'll come off completely in the back.
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And then in a small percentage, about 16,
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it's kinda balanced from about there to there.
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So let me show you the balanced portion
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with a little drawing right there.
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That's the balanced portion.
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So then we talked about the different types of SLAP lesions,
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and we said let's draw the labrum,
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we've got the glenoid here.
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So let's get a little bit of labrum right here
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goin' around the periphery.
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And now we start making some labral tears.
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So the first one, which doesn't involve the biceps in red,
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is the sort of the gentle frayed SLAP I?
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So then we'll take that one away.
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And the one that's more well-defined and deeper,
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almost like you cut it with a scissors, is the SLAP II.
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And the SLAP II is going to go up,
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and it's going to affect the base of the labrum
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almost every time.
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Occasionally maybe you'll get one in the back
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of the superior labrum and a balanced takeoff of the biceps
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that misses the biceps.
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But that's the exception rather than the rule.
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Now we already said in a bucket handle tear
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some of the labrum stays.
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So I'll make labrum here in dark blue.
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I'll draw over it.
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Some of the labrum stays at the base of the biceps,
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some separates.
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So you get your Cheerio sign.
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There's the middle of the Cheerio right here
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at a different color blue.
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And this would be a SLAP III, the bucket handle tear.
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Now in a SLAP IV, a misconception,
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in a SLAP IV you often have a bucket handle tear
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with extension into the biceps.
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So that means that you've got two tears going on here.
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Occasionally you'll have a SLAP II
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with extension into the biceps.
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If you have a SLAP II, the base of the biceps is bare,
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but if you have a SLAP III the base of the biceps
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still has labored labrum at its base.
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Then we get into SLAP V and on.
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And that would be the Maffet Classification System.
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So the first four, I through IV is Snyder.
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The Maffet, V, easy,
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that's just one that goes down and around
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in the front and could be a collision lesion
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or associated with a shoulder dislocation.
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Then you've got VI, which we haven't discussed yet,
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which is a flap-like lesion that kind of falls down
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either in the front or in the back.
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So it's a flap tear.
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That'll be a story for another vignette.
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And then you've got the VII,
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which comes down and around and dissects into the MGHL.
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So now let's take a look at this case.
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This case is defined by its axial,
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but I'm gonna show you the coronals and the axials together,
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and immediately on scrolling the axials
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everybody sees this huge cyst
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spilling over the spinoglenoid rim
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into the suprascapular notch.
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And the poster label rim is just a complex mess.
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However, when we look at the coronal projection,
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especially the PD fat suppression,
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more than the T2 for this lesion is chronic.
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So it doesn't show up so well on the T2,
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but on the very heavily water-weighted image,
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let's scroll.
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Perhaps it's there.
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It's certainly there.
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It should go away as you go posteriorly, if it's normal.
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It doesn't.
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It keeps transitioning into this tear.
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And here it comes.
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There's the rest of the tear coming down
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with these multiple cysts.
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Let's go in the axial projection
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and see just how high it goes.
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Here we are at about the mid-equator level.
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We still have a very robust tear.
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Now let's work our way up, craniad.
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We still have the tear and our cyst still working craniad.
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That is not a normal triangular hypointense labrum.
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Upper quadrant, still not a normal labrum.
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Still not normal, too gray and too swollen.
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And now we're probably into normal labrum.
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So posterosuperior quadrant, going around the back,
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often seen, by the way, in weightlifters
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and bench pressers and military pressers.
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This is an example of a chronic SLAP VIII,
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the first one in the Modarresi Classification System.
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Let's move on, shall we?