Cerebral venous sinus thrombosis.

Cerebral venous sinus thrombosis (CVST) is a rare and potentially deadly condition. Common etiologies include hypercoagulable diseases, low flow states, dehydration, adjacent infectious processes, oral contraceptives, hormonal replacement therapy, pregnancy, and puerperium. Symptoms include nausea, seizures, severe focal neurological deficits, coma, and headache (the most common presenting symptom). Anticoagulation is the mainstay of treatment for CVST. Transvenous clot lysis can be performed using injected thrombolytic agents and specialized catheters for clot retrieval.