Avascular necrosis of the knee

Case contributed by Frank Gaillard
Diagnosis certain

Patient Data

Age: Young adult

Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.

Multiple geographic regions of abnormal bone marrow signal with double line sign and rim sign, features characteristic of avascular necrosis. 

Annotated image

Open arrow = double line sign; Simple arrow = rim sign

Case Discussion

This young bone marrow recipient patient is on high dose steroids, and developed extensive AVN of the knee.

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