患者男,37岁。2个月前无明显诱因出现左下肢麻木乏力,逐渐向上发展并累及右下肢,尚能行走,继而出现腰背部间断性疼痛伴麻木感,伴小便充盈性失禁,并性功能降低,大便控制差。外院腰椎MRI检查示骶尾部占位。患者自发病以来神志清楚,精神一般,饮食、睡眠欠佳,体重未见明显改变。否认肝炎、结核等传染病史,否认高血压病史、精神病 Male patient, 37 years old. 2 months ago there was no obvious incentive left lower extremity numbness, gradual upward development and involving the right lower extremity, still able to walk, followed by intermittent intermittent pain with numbness, with urinary incontinence, and sexual dysfunction, poor stool control . External lumbar MRI examination showed sacrococcygeal tail space. Since the onset of patients with conscious, mental, diet, poor sleep, no significant weight change. Denied the history of infectious diseases such as hepatitis and tuberculosis, denied a history of hypertension and mental illness