Cerebral sinus thrombosis in a child with active ulcerative colitis and factor V Leiden.

Ulcerative colitis (UC) is a rare cause of cerebral sinus thrombosis. We describe a 10-year-old patient with UC who developed cerebral sinus thrombosis during an acute exacerbation of his colitis and was found to be heterozygous for factor V Leiden. He was successfully treated with enoxaparin.