PMC4456986_01
(A, B) Two contiguous axial head CT images showing diffuse subarachnoid hemorrhage, most prominent along the right fronto-temporal convexity. No parenchymal changes seen.
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A head CT was obtained which revealed diffuse SAH, most prominent along the frontotemporal convexities (Figure 1A, 1B).
Sagittal and axial T1-weighted images (A, B) showing an intrinsic bright signal within the superior sagittal sinus (arrows) with loss of a normal flow void. Axial FLAIR image (C) in the same patient showing a bright signal within the sulci (arrow) corresponding to the SAH seen on CT, along with a bright thrombus signal within the superior sagittal sinus (arrowhead). Complete non-opacification of the superior sagittal, right transverse and sigmoid sinuses (white arrows) on MR venogram (D). The left transverse sinus is patent (grey arrow).
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Brain MRI and MR venogram were carried out and demonstrated dense dural venous sinus thrombosis involving the posterior two-thirds of the superior sagittal sinus, as well as the right transverse and sigmoid sinuses [Figure 2A-2D].