Pseudotumor cerebri (idiopathic intracranial hypertension)

A 28-year-old female presented with acute binocular horizontal diplopia. She had no significant past medical history and her basal metabolic index (BMI) was 33. She complained of persistent and recurrent, severe, occipital headache, transient visual obscurations lasting 3–4 seconds at a time in both eyes (OU), pulse-synchronous tinnitus, as well as the binocular horizontal diplopia. She denied any photophobia, phonophobia, vertigo, or any other neurological symptoms. She was taking no medication and denied the use of medications causing increased intracranial pressure (ICP) (e.g., tetracycline, corticosteroids, vitamin A derivatives, lithium, nalidixic acid). The remainder of her past medical, surgical, medication, and social history was unremarkable…