1　临床资料1.1　一般资料　男8例,女3例,年龄:18～72岁,平均48.5岁。其中年龄在18～35岁2例,36～50岁1例,51～60岁2例,60岁6例。1.2　诊断经过　本组11例临床无神经系统症状,全部经CT或MRI检查而发现。因头部外伤发现脑瘤5例,其中2例在外伤后CT片上直接发现占位病变;1例脑外 1 Clinical data 1.1 General Information 8 males and 3 females, aged 18 to 72 years, mean 48.5 years old. Among them, two cases were aged from 18 to 35 years, one case from 36 to 50 years old, two cases from 51 to 60 years old and 6 cases from 60 years old. 1.2 Diagnosis After this group of 11 cases of clinical neurological symptoms, all by CT or MRI examination and found. Brain tumor was found in 5 cases due to head injury, of which 2 cases were found directly in the post-traumatic CT film lesions; 1 case of brain