Hydrocephalus due to superior sagittal sinus thrombosis.

The great variability of clinical appearance is one of the main features of superior sagittal sinus thrombosis. However, hydrocephalus associated with cerebral sinus thrombosis is rare. We report on a patient presented with thunderclap headache, accompanied by nausea, vomiting, and drowsiness. Lumbar puncture ruled out subarachnoid hemorrhage, whereas CT revealed marked hydrocephalus. In addition, magnetic resonance venography then confirmed the diagnosis of cerebral sinus thrombosis. It is a rare occurrence but clinically important, since it entails disastrous sequels if unrecognized, and hydrocephalus is treated in the usual fashion with ventricular drainage.