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良性颅内压增高症(benign intracranial hypertension,BIH)或原发性颅内压增高症(idiopathic intracranial hypertension,IIH)临床上并不罕见,这类患者几乎总是首先被考虑为脑瘤所致的颅内高压症,故临床上又称假性脑瘤(pseudotumorcerebri,PTC)[1].