52 yoM with Knee pain. Plain film and MR. DJD

This case came across the desk recently. I wasn’t sure what the marrow
decreased signal was but had an idea. The patient had meniscus surgery a
few years ago and now has increased pain. No prior studies. The Orthopedist
wants to r/o DJD and recurrent meniscal tear. No significant past medical
history and no other supplied surgical history other than meniscal surgery
of this knee.

One of my partners, Meghan Blake said “I’ve seen it. I think it is ______”.

Fill in the blank.

1. Full strength methyl methacrylate.
2. Methyl methacrylate diluted 1:1 with vodka (to hide the taste).
3. Medullary neoplasm (Especially prostate metastatic disease).
4. Calcium phosphate injected at the time of arthroscopy.
5. Bisphosphonate pulverized in a mortar and pestle then injected.

Please reply to me and I’ll summarize within the next couple of days.

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