MR Imaging Features of Pigmented Villonodular Synovitis of the Cervical Spine
Hemant A. Parmara,
Yih Yian Sitoha,
Kheng Kooi Tanb,
Jennifer Teoc,
Marie Ibet S.b and
Francis Huia
a Department of Neuroradiology, National Neuroscience Institute, Singapore, Republic of Singapore
b Department of Neurosurgery, National Neuroscience Institute, Singapore, Republic of Singapore
c Department of Neuropathology, National Neuroscience Institute, Singapore, Republic of Singapore
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FIG 1 Lateral radiograph of the cervical spine shows a soft tissue mass destroying the posterior elements of the lower cervical spine (arrow). There are no foci of calcifications seen within this mass.
FIG 2. Sagittal T1-weighted images before (A) and after (B) contrast administration show an expansile mass lesion involving the posterior elements of C5 and C6 vertebra. This mass shows homogeneous enhancement after contrast material administration. It is seen to displace the thecal sac anteriorly. C, Axial T1-weighted postcontrast image with fat suppression shows the exact delineation of the mass with an anteriorly displaced thecal sac (arrow).
FIG 3. Sagittal gradient-echo T2-weighted image shows the mass to be hyperintense with no evidence of T2 shortening within it to suggest areas of hemosiderin deposition.
FIG 4. Histopathologic section of pigmented villonodular synovitis depicting sheetlike growth within the main tumor mass, which is comprised of mononuclear cells and multinucleated giant cells within the collagenized stroma. Hematoxylin and eosin (x100).
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