Pigmented Villonodular Synovitis of the Thoracic Vertebra Presenting with Progressive Spastic Paraparesis

<table>Immunohistochemistry ×40 CD68 positivity in mononuclear, histiocytic, and multinuclear giant cells.</table>

Case Reports in Orthopedics

Figure 5: Pigmented Villonodular Synovitis of the Thoracic Vertebra Presenting with Progressive Spastic Paraparesis 