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Fig. 4C —16-year-old girl with multiple traumatic injuries in head. Initial unenhanced CT (not shown) showed hyperdensity in right internal jugular vein (IJV) and sigmoid sinus that was suspicious for venous thrombosis. Findings were confirmed on CT venography, MRI, and conventional venography. Sagittal planar reconstruction of CT venography shows thrombus extending from right IJV (asterisk) into sigmoid sinus (arrow), correlating well with findings on conventional venography (E).