[Clinical features and survival analysis of patients with CD20 positive adult B-lineage acute lymphoblastic leukemia]

To explore the clinical and survival significance of CD20 positive adult patients with B-lineage acute lymphoblastic leukemia (B-ALL).The clinical features and survival of 168 adult patients with B-ALL diagnosed and treated in our department from May 2007 to July 2011 were analyzed retrospectively, 58 expressed CD20 and 110 not.The sex, distribution of age, anemia, thrombocytopenia, infiltration of liver, spleen and lymph nodes, the expression of myeloid lineage marker, incidence of Ph chromosome, complete remission within 4 weeks showed no significant differences in CD20 positive and negative groups (P0.05); median white blood cell count at diagnosis and the rate of patients with high white blood cell count in CD20 positive group were 19.2×10⁹/L and 37.9% respectively, which were significantly higher than those of 6.93 × 10⁹/L and 20.9% in CD20 negative group (P0.05); cumulative incidence of relapse between two groups showed significant difference (P0.05); multivariable analysis for overall survival and progress-free survival identified CD20 positivity as independent predictor.The expression of CD20 in adult patients with B-ALL appeared to be associated with high white blood cell count and poor prognosis.