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  Indian J Med Microbiol
 

Figure 1: Venous collateral scale 0 case (a); Thrombosis in the left transverse sigmoid sinus, no collatetal appearance providing drainage of the affected area. venous collateral scale 1 case (b); Partially recanalized thrombus in the anterior and distal of the superior sagittal sinus, cortical vein (arrow) that provides drainage from the location of the thrombus to other collatetal venous structures. Venous collateral scale 2 case (c and d); thrombus in the superior sagittal sinus, collateral (arrowhead) providing drainage to the inferior sagittal sinus, and collateral (arrow mark) providing drainage to the left sphenoparietal sinus

Figure 1: Venous collateral scale 0 case (a); Thrombosis in the left transverse sigmoid sinus, no collatetal appearance providing drainage of the affected area. venous collateral scale 1 case (b); Partially recanalized thrombus in the anterior and distal of the superior sagittal sinus, cortical vein (arrow) that provides drainage from the location of the thrombus to other collatetal venous structures. Venous collateral scale 2 case (c and d); thrombus in the superior sagittal sinus, collateral (arrowhead) providing drainage to the inferior sagittal sinus, and collateral (arrow mark) providing drainage to the left sphenoparietal sinus