Objective:This study aimed to investigate the expression of CD20 antigen in adult B cell acute lymphoblastic leukemia and explore the relationship between CD20 expression and clinical characteristics,efficacy,prognosis.Result:The expression of bcr-abl in CD20 positive group was lower than CD20 negative group,the difference was significant.There was no significant difference between the white blood cell counts in newly diagnosed,hemoglobin level,platelet counts,bone marrow blast cell ratio,serum lactate dehy...