Idiopathic intracranial hypertension is a neurological disorder characterized by isolated increased intracranial pressure manifesting with recurrent and persistent headaches, nausea, vomiting, progressive and transient obstruction of the visual field, papilledema. Visual loss can be irreversible. The disease is Monarch Disease Ontology id MONDO_0009468 (pseudotumor cerebri). Also known as: IIH, Idiopathic Intracranial Hypertension, benign intracran. hypt., benign intracranial hypertension, idiopathic intracranial hypertension.