Presentation
Left knee pain.
Patient Data
Sclerotic region of lateral femoral condyle articular surface. No aggressive features. No calcified intra-articular body. No joint effusion.
The patient could not undergo an MRI due to an incompatible medical device.
The bones appear generally low density.
Posterior lateral femoral condyle (non-weightbearing surface) osteochondral defect with a lucent rim. No intra-articular body. No other focal osseous lesion.
No knee joint effusion. Large Baker's cyst.
Case Discussion
This is a case of an osteochondral defect of the lateral femoral condyle with a detached non-displaced fragment, which corresponds to a stage III lesion (although this staging is typically done on MRI). The patient had a known history of secondary osteoporosis, corresponding with the features of low bone density.
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