Presentation
Knee pain
Patient Data
Age: 60 years
Gender: Female
From the case:
Pigmented villonodular synovitis - knee
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MRI demonstrating mass-like synovial proliferation with lobulated margins that show T1WI and T2WI and PD fat sat low signal intensity and blooming effect due to hemosiderin deposition.
Case Discussion
Pigmented villonodular synovitis (PVNS) that involves all of the contiguous synovium is the most common form of an intra-articular disease, non-ossified synovial chondromatosis is main differential diagnosis. PVNS is most common monoarticular (70% in knee joint) but it can be oligoarticular.