Article Figures & Data
Figures
- Fig 1.
A, Sagittal T2-weighted (TR, 3300 msec; TE, 100.8 msec) image of the thoracic spine defines the caudal aspect of the epidural fluid collection at T6–T7. A prominent central disk extrusion is present at T5–T6. B, Axial T2-weighted (TR, 2600 msec; TE, 103.1 msec) image through the T5–T6 disk extrusion further delineates the ventral epidural fluid collection displacing the dura posteriorly. Note the prominent T2 hypointensity on the cord surface secondary to superficial siderosis. C, D, Postmyelography CT images in similar planes and at analogous levels to the MR images demonstrate that the ventral epidural fluid collection is opacified by intrathecal contrast to a degree similar to CSF within the thecal sac, confirming the presence of an active CSF leak. The prominent T5–T6 disk extrusion is partially calcified. Ventral epidural fluid collection (white arrows), dura (white arrowheads), T5–T6 disk extrusion (open arrowhead), and subarachnoid clot (black arrows) are shown.
- Fig 2.
Lateral views of the thoracic spine acquired during digital subtraction myelography with the patient in the prone position. For temporal reference, the initial image is designated as time of (A) 0.0 second, and the subsequent images are at (B) 0.4 second, (C) 1.4 seconds, (D) 3.6 seconds, and (E) 11.2 seconds. Contrast is seen to progressively extend cephalad dependently within the thecal sac (black arrowheads). At T6–T7, the contrast slightly deviates dorsally because of mass effect on the dura by the caudal aspect of the epidural fluid collection (white arrowheads). Contrast focally extravasates through the ventral dural tear at T5–T6 (white arrow) into the epidural collection (black arrows). Contrast extends cephalad within both the thecal sac and the epidural collection. Ultimately, the epidural fluid collection becomes more dense (*) because of its smaller volume relative to the subarachnoid space.
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