Could this be mets?

I have sent the T1 images (sorry they were not included in the first) . I
have also included the T1fs pre post. Some of the first comments have been

Bone Infarct
Hematogenous marrow conversion +/_ related to treatment.

I first considered infarct but don’t love this as the morphology and signal
don’t quite fit.
I did consider red marrow conversion (reconversion) and the T1 does support
that. He has had radiation and chemotherapies. He has also had
near-complete quadriceps muscle resection.

Unfortunately, I do not have MR images of the contralateral femur/thigh.