Differentials for small lesion near Patellar Tendon

[Diane]

Hello!

I scanned this male for general knee pain and saw an incidental hypoechoic nodule lesion adjacent to the medial aspect of the patellar tendon.
I thought it was non specific.. The reporting radiologist said ?chronic epidermoid cyst, unlikely to represent mets because it was avascular.

Any ideas?

Thanks!

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[Stephen Bird]

I completely agree with your radiologist,

At first I thought it was too far removed from the dermis, but late in the video there is a hint of a punctum.

The other differential I would include would be an area of chronic fat necrosis as this part of the body is commonly traumatised.

It looks really benign whatever it proves to be.

Steve

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