原发性低颅内压综合征(Primary Intracramial Hypatension,以下简称PIH),是一种以头痛为主要症状的一组综合征。临床上以发病突然,原因不明,症状与体征不符(有较剧烈的头痛、眩晕、恶心、呕吐等酷似高颅压的表现而无明显阳性体征),预后良好为特征。本征临床少见,常被误诊为蛛网膜下腔出血、颅内高压症。1983年以来我院收治6例PIH,均做 Primary Intracranial Hypatension (PIH) is a group of syndromes characterized by headache as the main symptom. Clinically with the onset of a sudden, unexplained, symptoms and signs do not match (with more severe headache, dizziness, nausea, vomiting and similar symptoms of high intracranial pressure without significant positive signs), a good prognosis. Intrinsic clinical rare, often misdiagnosed as subarachnoid hemorrhage, intracranial hypertension. Since our hospital since 1983, 6 cases of PIH, are done