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<v ->The intracapsular lipoma is a rare lesion.

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In my experience, it's a solitary, fatty tumor,

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more common in a joint than in bursa or a tendon sheet.

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The knee, again, the most common location.

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Variable size.

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I've seen some that have filled the entire joint,

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I'll show you a few, a couple of examples.

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Some of them, not all, will have a stalk

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that connects with the joint capsule.

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All right?

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These may ossify occasionally,

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and that leads to a bit of a problem

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because some people regard them as a second condition,

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an intracapsular chondroma,

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I'll be talking about that today,

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but most people believe they begin as a fatty lesion,

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and hence the term intracapsular lipoma,

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surgery may be required.

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So here's an example of a single,

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but lobulated intracapsular lipoma involving the knee joint.

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You can see the size of this lesion,

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which is dramatic,

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with a typical signal intensity characteristic of fat.

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Here's another one.

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And as I look at this one,

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it is kind of interesting to me

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because as I look at the bottom part I wonder,

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here is the lipoma.

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This may be not the edge of the lipoma,

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but a thick and superior plica,

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suggesting that this may have developed

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above a thickened superior plica.

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Intracapsular liposarcomas,

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I include just to be complete in this lecture.

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These are extremely rare.

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I have little or no experience with them.

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They're said to occur most commonly in the knee,

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especially posteriorly.

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And they appear as single or multiple masses.

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The signal intensity,

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a bit of a problem

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because it is not typical of fat.

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So I think you're gonna have problems with cases like this.

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This one taken from the literature

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because there's nothing specific,

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as I look at this, to tell me that this is a liposarcoma.

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So we've reached the case review,

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now for the third segment.

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And, once again,

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I turn this over to Marcelo,

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sitting in a hotel in Switzerland.

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Marcelo.