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Case 100: Spinal Epidural Meningioma¹

¹ From the College of Medicine and King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia. Received January 29, 2004; revision requested March 31; revision received May 4; accepted May 24; final version accepted June 25.

View larger version (89K): [in this window] [in a new window] [Download PPT slide]   Figure 1a: Fast spin-echo sagittal images of the dorsal spine. (a) T1-weighted (repetition time msec/echo time msec, 500/20; section thickness, 4 mm) image shows the posterior epidural mass (arrow) has signal intensity similar to that of the spinal cord. The subarachnoid space is obliterated at the level of the mass, and the spinal cord is compressed. Note the normal shape and signal intensity of the vertebrae. (b) T2-weighted (4000/111; section thickness, 4 mm) image shows the mass has mixed signal intensity, with dura mater seen as a dark line (arrow) separating the extradural mass from the intradural structures. High signal intensity within the compressed spinal cord probably represents edema secondary to compression.

View larger version (95K): [in this window] [in a new window] [Download PPT slide]   Figure 1b: Fast spin-echo sagittal images of the dorsal spine. (a) T1-weighted (repetition time msec/echo time msec, 500/20; section thickness, 4 mm) image shows the posterior epidural mass (arrow) has signal intensity similar to that of the spinal cord. The subarachnoid space is obliterated at the level of the mass, and the spinal cord is compressed. Note the normal shape and signal intensity of the vertebrae. (b) T2-weighted (4000/111; section thickness, 4 mm) image shows the mass has mixed signal intensity, with dura mater seen as a dark line (arrow) separating the extradural mass from the intradural structures. High signal intensity within the compressed spinal cord probably represents edema secondary to compression.

View larger version (94K): [in this window] [in a new window] [Download PPT slide]   Figure 2a: Contrast material–enhanced (a) sagittal and (b) transverse T1-weighted fast spin-echo MR images of the dorsal spine obtained with frequency-selective fat saturation (467/15; section thickness, 4 mm) depict strong and homogeneous contrast enhancement of the posterior epidural mass (arrow). In b, note complete filling of the posterior epidural space and lack of extension through the intervertebral foramina to the paravertebral space.

View larger version (73K): [in this window] [in a new window] [Download PPT slide]   Figure 2b: Contrast material–enhanced (a) sagittal and (b) transverse T1-weighted fast spin-echo MR images of the dorsal spine obtained with frequency-selective fat saturation (467/15; section thickness, 4 mm) depict strong and homogeneous contrast enhancement of the posterior epidural mass (arrow). In b, note complete filling of the posterior epidural space and lack of extension through the intervertebral foramina to the paravertebral space.