Figure 1: Magnetic resonance imaging of the thoracic spine with gadolinium contrast at the T9-10 region demonstrating an enhancing intradural extramedullary lesion exiting the neural foramen. (a) Preoperative MR imaging showing the initial size of the mass ( cm) with no spinal cord compression. (b) Immediate postoperative MR image demonstrating subtotally resected mass with a cm residual within the right neural foramen. (c) MR imaging obtained 5 months postoperatively demonstrating progression of the enhancing component measuring cm. (d) MR imaging with gadolinium enhancement showing stable disease 15 months after stereotactic radiosurgery.