“…Although in 25% of cases the etiology remains elusive, the usual risk factors of CVST are meningitis, parameningeal infections, facial and paranasal sinus infections, thrombophilia, antiphospholipid syndrome, homocystinuria, pregnancy, alcoholism, dehydration, malignancies, paroxysmal nocturnal hemoglobinuria, and contraceptive medications [3]. 25% of cases etiology remains elusive [3]. Superior sagittal sinus remains the most common site for thrombus formation (72%), followed by lateral sinus (70%) [3].…”