Snapshot A 28-year-old woman is referred to a headache neurologist for throbbing left-sided headaches that are refractory to numerous analgesics. Her headache is associated with episodes of double vision and "vision blurriness." She also endorses worsening headache with a cough and has experienced nausea. Her BMI is 32 kg/m2. Neurological examination is notable for a left-sided sixth nerve palsy, decreased visual fields, and papilledema on fundoscopy. She undergoes an MRI brain with MR venography, which is unremarkable. A lumbar puncture demonstrates a significant opening pressure with normal protein, glucose, and cells. She is started on acetazolamide and is referred to an Ophthalmologist for possible optic nerve sheath fenestration. Introduction Definition login to view 2 more bullets Epidemiology Risk factors login to view 4 more bullets Pathogenesis Believed to be due to reduced cerebrospinal fluid absorption Can be associated with medications Presentation Symptoms login to view 5 more bullets Physical exam login to view 3 more bullets Imaging MR brain with MR venography login to view 7 more bullets Studies Lumbar puncture login to view 8 more bullets Ophthalmic examination login to view 2 more bullets Differential Migraine login to view 2 more bullets Secondary causes of increased intracranial pressure login to view 2 more bullets Treatment Medical login to view 8 more bullets Operative login to view 3 more bullets Complications Blindness