Type 2 CSF leak (SLEC-P). Type 2 CSF leak (SLEC-P). A, Schematic depiction of a proximal nerve root sleeve tear bridging the epidural and neural foraminal.

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Presentation transcript:

Type 2 CSF leak (SLEC-P). Type 2 CSF leak (SLEC-P). A, Schematic depiction of a proximal nerve root sleeve tear bridging the epidural and neural foraminal compartments. B–G, From a single patient. B, Sagittal T1WI of the brain shows the engorged pituitary gland (open white arrow) and dural thickening on the clivus (short white arrows). C, Sagittal T1WI of the brain shows a “positive venous distension sign” with a convex undersurface of the middle third of the dominant transverse sinus (short black arrow). D, T2-weighted axial MR image of the thoracic spine shows SLECs (white arrows) external to the dura (white arrowhead). E, Subtracted image from a prone thoracic DSM shows a posterolateral collection of contrast (black arrow). F and G, Subtracted and nonsubtracted images from a repeat right lateral decubitus DSM show contrast leaking into the extradural space (black arrows) from a tear along the proximal aspect of the right T11 root sleeve (long white arrow). Note the BB (nipple marker) placed on the skin for landmarking (dashed white arrow). R.I. Farb et al. AJNR Am J Neuroradiol 2019;40:745-753 ©2019 by American Society of Neuroradiology