Basilar Invagination / Impression (BI) Chiari MalformationsFibrous DysplasiaIdiopathic Intracranial Hypertension (Pseudotumor Cerebri)Intracranial AbscessIntracranial HypotensionParagangliomaShunt Failure / InfectionTension PneumocephalusUndiagnosed neuropathy InfectionNeurocystercosisPott’s DiseaseHIV/AIDS and CNS DiseasePost-op fevers