慢性硬膜下血肿(CSDH)是临床十分常见的颅脑外伤性疾病,由于其病程相对较长,临床表现复杂多样化,缺乏特征性,与颅内肿瘤及脑血管意外的临床表现非常相似,在未开展CT检查之前,此病极易误诊。我院于1997～1998年经CT确诊并行手术治疗的CSDH21例,对其发病机制、CT诊断进行分析。1 Chronic subdural hematoma (CSDH) is a very common clinical traumatic brain injury. Because of its relatively longer course, complicated and diversified clinical manifestations, and lack of characteristic features, CSDH is very similar to the clinical manifestations of intracranial tumors and cerebrovascular accidents. In the absence of CT examination before the disease is extremely easy to misdiagnosis. Our hospital from 1997 to 1998 confirmed by CT and surgical treatment of 21 cases of CSDH, its pathogenesis, CT diagnosis analysis. 1