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非外伤性慢性硬脑膜下血肿３２例，误诊时间２０天～２年，误诊为缺血性中风６例，高血压病５例，误诊为老年性痴呆、脑动脉硬化、颈椎病、颅内肿瘤各３例，病毒性脑炎、出血性中风、癫痫、ＳＡＨ各２例，帕金森综合征１例。确诊后及时行钻孔血肿清除，闭锁引流治愈３１例，死亡１例。误诊原因：过份强调外伤史；老年患者的精神症状为主要表现；与其它慢性疾病混淆以及ＣＴ检查的局限性等。
Non-traumatic chronic subdural hematoma in 32 cases, misdiagnosis time 20 days to 2 years, misdiagnosed as ischemic stroke in 6 cases, 5 cases of hypertension, misdiagnosed as senile dementia, cerebral arteriosclerosis, cervical spondylosis, intracranial tumors 3 cases in each case, 2 cases of viral encephalitis, hemorrhagic stroke, epilepsy and SAH, 1 case of Parkinson’s syndrome. Drudge hematoma was removed in time after the diagnosis, 31 cases were cured by blocking drainage and 1 died. Causes of misdiagnosis: excessive emphasis on history of trauma; psychiatric symptoms in elderly patients as the main performance; confusion with other chronic diseases and the limitations of CT examination.