Table 1:

Distribution of diffuse pachymeningeal hyperintensity on FLAIR imaging and/or bilateral subdural effusion/hematomas in patients with spontaneous intracranial hypotension

No./Age (y)/SexDiffuse Pachymeningeal Hyperintensity on FLAIR ImagingSubdural Effusion/Hematomas
1/36/Fbil. OC, falxbil. OC
2/59/Mbil. OC, falx, tentorium, PFCbil. OC
3/37/Fbil. OC, falx, tentorium, PFCbil. frontal convexity
4/37/Fbil. OC, falx, tentorium, PFCbil. frontoparietal convexity
5/39/Mbil. OC, falx, tentorium, PFCbil. frontal convexity
6/45/Fbil. OCND
7/48/Fbil. OC, falx, tentorium, PFCbil. OC
8/47/Fbil. OC, falxbil. OC*

  • Note:—OC indicates over the supratentorial convexity; PFC, posterior fossa convexity; ND, not detectable; bil., bilateral.

  • * Subdural effusion/hematomas were not found in initial study but were observed in the second study.