Abstract
Clinical manifestations of superior sagittal sinus (SSS) thrombosis are
nonspecific but characterized by headache, papilledema, seizures, focal
deficits, progressive coma and death. Recurrent transient focal neurologic
deficit is an extremely rare manifestation in superior sagittal sinus thrombosis
and the mechanism is unknown. A 45-year-old man presented with headache for two
weeks and four episodes of transient (5-10 minutes) right or left hemiparesis
for two days. Magnetic resonance image and transfemoral cerebral angiography
revealed superior sagittal sinus thrombosis with numerous prominent collateral
venous channels. There was no parenchymal lesion. After four days of
heparinization, no further transient focal neurologic deficits developed.
Follow-up angiography showed partial recanalization of the SSS. Possible
mechanism of transient ischemic attacks in this patient is thought to be a
transient functional disturbance due to a temporal reduction of tissue perfusion
in the process of operating fully-enough collateral channels.