Knee and Leg 23M sports injury 8 weeks ago, MR and CT. Please Help

Tatiane shared these images from another article, too…I will report it as a healing fracture with probable adjacent post-traumatic cyst, and suggest MRI follow up after the fracture is healed, if they think it’s indicated, to look for resolved marrow edema.

Images from this case:
>>> Post-traumatic osseous cyst of the distal radius in a child
https://www.sciencedirect.com/science/article/pii/S1930043321005148

On Fri, Sep 15, 2023 at 11:20 AM hilary umans <hilary.umans> wrote:


MRI 5 weeks after injury, no internal derangement
Edge of image lesion with what looks like central mineralization and tremendous perilesional edema…I reported probable osteoid osteoma and recommended CT

I don’t know the details of the sports injury, but this is complete or nearly complete non-displaced proximal tibial shaft fracture with callus.
That endosteal rounded lesion measures up to 1cm in maximal dimension and abuts the margin of the fracture; there is no internal mineralization.

I know we teach that osteoid osteoma and stress fracture are a classic differential diagnosis, but I’ve never seen an instance where both co-exist.
This is definitely a fracture.
Can I know if this is an osteoid osteoma?

This is a serious head-scratcher.
What do I report? It will take months for the tibial fracture to heal.
Should I recommend a follow up MRI? and / or CT? In 4-6 months?
Or what????

Thanks.

Hilary

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