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Imaging Features of Pigmented Villonodular Synovitis with Emphasis on Sonographic FindingsJ. Lin MD, W.J. Weadock, MD, T.J. Quinn MD, J.A. Jacobson MD, D.A. Jamadar MBBS, J.H. Ellis MDUniversity of Michigan, Ann Arbor Michigan |
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Case VI: 43 year old female with PVNS of the knee |
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Image N: Sagittal T1-weighted image showing a nodular soft tissue mass occupying the suprapatellar bursa and the infrapatellar portion of the anterior joint space (arrows). |
Image O: Sagittal T2-weighted image showing darker areas of more concentrated hemosiderin in the nodular soft tissue mass (arrows). |
Image P: Axial T1-weighted, gadolinium-enhanced image with fat saturation showing strong enhancement of the mass anterior to the trochlear notch (arrows). |
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Image Q: Transverse gray-scale image of the infrapatellar region at the midline demonstrating a heterogeneous mass (arrows) anterior to the trochlear notch of the distal femur. |
Image R: Transverse power Doppler image of the same region demonstrating hypervascularity of the soft tissue mass. |
Image S: Photomicrograph of the specimen from the patient above showing synovium with mononuclear cell infiltrate and pigmented macrophages with focal areas of hemosiderin deposition (arrow). |
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