<prompt> Which is not a characteristic feature of pseudo tumour cerebri?HeadacheDilated ventriclesIncreasing opening pressure during LPPapilledema  <response>: Ans: B. Dilated ventriclesRef: Harrisons Textbook of Internal Medicine- 18th edExplanation:Pseudo tumour cerebri:HeadacheNormal CSFNormal or small ventricular sizeCT MR1 are normalNo focal neurological deficitsTransient visual obscurations papilloedemaCauses:Metabolic causesHypervitaminosis AVit A deficiencySteroid therapySteroid withdrawalTetracuclineNalidixic acidIrom deficeincyHyper parathyroidismAdrenal insufficiency-Chromic 02 retentionAmiodaroneInfections causesPoliomyelithisGuiIlian barre syndromeOtitis media 