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<v ->Yesterday, we spent quite a bit of time

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talking about the subacromial-subdeltoid bursa

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and its connection to the subcoracoid bursa.

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I want to go back to that area just for a moment

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to indicate that one of the radiographic findings

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that you can see,

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when you have internal rotation of the shoulder,

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is a fat plane that extends from the acromion

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along the lateral margin of the humeral head.

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This is a peribursal fat plane.

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It's fat around the subacromial-subdeltoid bursa.

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When you have bursitis in that location,

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often that fat plane and that fat pad will disappear.

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So you have a radiographic finding of bursitis.

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The example that I show you here

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of primary bursitis in this location

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is a nice one, it's a rheumatoid.

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And these are rice bodies.

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You're gonna learn more about rice bodies

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a little bit later on.

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The trochanteric bursa is another site

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in which primary bursitis occurs.

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This is kind of a confusing entity,

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because if you go to the anatomy books,

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some references will list 10 or 12 different types

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of trochanteric bursa.

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So the locations vary slightly,

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but of course they are very close

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to the tuberosity

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and the greater trochanter, not the ischial tuberosity.

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But what's confusing about it is,

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here I show you an example of fluid

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within the trochanteric bursa,

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but there are small amounts of fluid in other bursa.

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These are intimate with the gluteal tendons

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as they too attach to the greater tuberosity.

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Trochanteric bursitis clearly a cause of trochanteric pain,

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but there are many other causes of pain

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in this particular area.

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I've listed some of them at the bottom of the slide.

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And I show you an example of a person

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who has a snapping hip,

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an audible sound with certain positions of the hip

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related to friction

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between the iliotibial tract

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and the greater trochanter of the femur.