ｌ临床资料 患者，男，引岁，国牙龈出血伴双下肢瘀点Ｚｄ入住我科，经骨髓穿刺检查确诊为急性淋巴细胞白血病（乌型），予以ＶＤｕ方案诱导达完全缓解，并经中剂量阿糖胞若加威猛巩固治疗一疗程后出院。出院后不久即出现双下肢乏力，双膝关节酸痛，再次入住我科。入院时体查； Clinical data Patients, male, age-old, country gingival bleeding with lower extremity petechia Zd admitted to our department, diagnosed by bone marrow biopsy as acute lymphoblastic leukemia (U-shaped), to VDu regimen induced complete remission, and by the medium dose If the glycyrrhizine plus solid therapy after a course of treatment was discharged. Shortly after discharge from the hospital, her lower extremity weakness, knee pain and soreness were found again. Physical examination on admission