<prompt> All of the following are recognized features of pseudotumor cerebri, except:PapilledemaAbsence of true localizing neurological deficitIncreased protein content in the CSFNormal sized ventricles on CT scanning  <response>: Pseudotumor CerebriAlso called as idiopathic intracranial hypeension Pseudotumor cerebri PTC, is a neurological disorder that is characterized by increased intracranial pressure pressure around the brain in the absence of a tumor or other diseases. Occur in young and obese woman Symptoms - headache, nausea, and vomiting, pulsatile tinnitus, double vision, swelling of the optic disc in the eye, which can progress to vision lossCauses of Pseudotumor cerebriDiagnostic criteria - Modified Dandy criteriaHigh-dose vitamin A derivatives e.g. isotretinoin for acne, long-term tetracycline antibiotics for a variety of skin conditions and hormonal contraceptivesSecondary intracranial hypeension includes obstructive sleep apnea a sleep-related breathing disorder, systemic lupus erythematosus SLE, chronic kidney disease, and Behcet;s diseaseSymptoms of raised intracranial pressure headache, nausea, vomiting, transient visual obscurations, or papilledemaNo localizing signs with the exception of abducens sixth nerve palsyThe patient is awake and aleNormal CTMRI findings without evidence of thrombosisLP opening pressure of 25 cmH2O and normal biochemical and cytological composition of CSFNo other explanation for the raised intracranial pressureManagement Discontinue the offending drug treat the etiology Weight reduction Lumbar puncture offers transient relief Surgical management Optic nerve sheath fenestrationLumboperitoneal shunt Venous sinus stenting Refer: Harrisons Principles of Internal Medicine, 18th edition, pg no: 123,233 