Aseptic cortical venous thrombosis is rare without concomitant dural s
inus thrombosis, Ulcerative colitis is associated with both dural sinu
s thrombosis and isolated cortical venous thrombosis. We describe a 26
-year-old woman with ulcerative colitis who had a spontaneous cerebral
hemorrhage. An overlying thrombosed cortical vein was identified on s
pin-echo MR images and confirmed with angiography. Signal characterist
ics of thrombosed cortical veins are similar to those described in dur
al sinus thrombosis.