62F infrapatellar swelling x 6 months, XR and MRI Please Help

I received several comments, thank you
The consensus is that this looks aggressive and high grade surface osteosarcoma was specifically mentioned by a few

We will keep BPOP in the ddx….and someone suggested calcified leiomyoma as a very unlikely possibility
HADD was suggested, but this certainly is not HADD

If, by some miracle, we get follow-up, we will share it……🤞

Hilary

On Mon, Dec 9, 2024 at 8:45 AM hilary wrote:


XR from 6 mos ago

Non contrast, T1 and STIR images from an open 1.2T MRI

If not for her age, I might think of parosteal osteosarcoma that is now invading the medullary cavity….
Wondering if BPOP would have subcortical marrow signal abnormality
Not sure what else to include in differential

Please help.

Hilary

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