CASE HISTORY
Knee pain. No injury.
TECHNICAL FACTORS
Long- and short-axis fat- and water-weighted images were performed.
KEY IMAGES
This case has no key images.
CASE FINDINGS
- No microtrabecular or macrotrabecular fracture.
- Slightly laterally displaced patella. Massive induration of Hoffa fat pad.
- No high-grade chondromalacia of the patellofemoral compartment.
- Flexors and extensors are intact.
- Partial-thickness chondral thinning of the weightbearing medial femoral condyle. Minimal marginal spurring medial femoral condyle. Stable healing complex vertical tear in the outer red-red zone posterior horn to posterior body of the medial meniscus likely from original pivot-shift injury.
- PCL is intact. ACL graft is intact. Giant cyclops lesion anterior to the ACL graft favored over localized PVNS (also known as giant cell tumor of tendon sheath intra-articular).
- MCL and LCL are intact.
- No high-grade chondromalacia of the lateral compartment. Minimal marginal spurring lateral femoral condyle. No lateral meniscus tear.
- Posterolateral corner is intact.
- 2+ proteinaceous effusion.
- Swelling of the subcutaneous tissues anteriorly.
CASE CONCLUSION
- ACL graft is intact with giant cyclops lesion anterior to the ACL graft favored over localized PVNS.
- Stable healing complex vertical tear outer healing red-red zone posterior horn to posterior body of the medial meniscus likely from original pivot-shift injury.
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