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SYNOPSIS

In a patient presenting with headache, who later developed bilateral sixth nerve palsies and papilledema, an initial CT scan (unenhanced and enhanced) was normal, and a later CT scan was suggestive of superior sagittal sinus thrombosis. An MRI scan gave much less equivocal evidence of thrombosis of both the sagittal and the right transverse sinus. The diagnosis was confirmed by digital venous angiography.

MRI is a noninvasive investigation useful in the diagnosis of dural venous sinus thrombosis.