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Focal pigmented villonodular synovitis (PVNS)

Case contributed by Mohammad A. ElBeialy
Diagnosis certain

Presentation

Knee pain.

Patient Data

Age: 50 years
Gender: Female

A small localized nodular synovial proliferation is seen indenting the superolateral aspect of the infra-patellar Hoffa's pad of fat, it is seen demonstrating hypointense T1 and hyperintense STIR / PD fat suppression signal. It measures 14 X 13 X 11 mm in its main diameters.

Mild joint effusion.

No meniscal tear. Intact cruciate and collateral ligaments. Intact articular cartilage. No marrow signal abnormality.

Case Discussion

Focal pigmented villonodular synovitis.

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