Neurology 2013; 81: 1789-92.
Authors did MRI's on 12 patients with CTM proven leaks ("gold standard" test). 11/12 had positive MRI of spine with extradural fluid collections (highly sensitive) and 6/12 having spinal dural enhancement (less sensitive). The dura is seen as a pencil line on sagittal T1 because its displaced by fluid in the dorsal epidural space. Other signs to be expected are brain sag, pachymeningeal enhancement, posterior fossa crowding and cerebellar tonsillar descent.
Authors did MRI's on 12 patients with CTM proven leaks ("gold standard" test). 11/12 had positive MRI of spine with extradural fluid collections (highly sensitive) and 6/12 having spinal dural enhancement (less sensitive). The dura is seen as a pencil line on sagittal T1 because its displaced by fluid in the dorsal epidural space. Other signs to be expected are brain sag, pachymeningeal enhancement, posterior fossa crowding and cerebellar tonsillar descent.
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