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Figure 10b. Thrombosis of the left transverse and sigmoid sinuses and temporo-occipital veins in a 45-year-old woman. (a, b) Axial unenhanced CT images show parieto-occipital subarachnoid hemorrhage (arrowhead in b) with superficial temporo-occipital areas of high attenuation (arrow in a), findings suggestive of thrombosed cortical veins (cord sign). (c) Axial contrast-enhanced CT image shows thrombosis of the left transverse and sigmoid sinuses (arrows). (d) Three-dimensional integral image from CT venography shows filling defects in the left transverse sinus and temporo-occipital veins, an appearance consistent with thrombosis.
