大脑灰白质的多发性多形态病灶，病因不尽相同，若不结合临床病史，侧可误诊。我们发现5例驱虫净所致脑炎第一次都误诊，经过1－2次复查及询问取药史才确诊，现报道如下。例1，女，引岁．四肢无力17天入院。发病前15天曾服用驱虫净。体检；意识清、两上肢肌力N－v级，两下肢肌 Cerebral gray matter multiple pleomorphic lesions, the cause is not the same, if not combined with clinical history, side misdiagnosis. We found that 5 cases of insect-causing encephalitis caused by the first misdiagnosis of encephalitis, after 1-2 times the history of inquiry and medication was diagnosed, are reported below. Example 1, female, lead age. Limbs weakness 17 days admission. 15 days before the onset of deworming net taken. Physical examination; consciousness clear, two upper limb muscle strength N-v level, two lower limb muscle