RESUMO
Objective To investigate the expression of myeloid antigen(MyAg) in acute lymphoblastic leukemia (ALL) and its correlation with clinical characteristics and prognosis.Methods The clinical data of 103 newly diagnosed ALL 1patients were retrospectively analyzed.These patients were divided into myeloid antigen-positive group (MyAg+ ALL) and myeloid antigen-negative group(MyAgALL) based on the flow cytometry(FCM) analysis in bone marrow.The correlation of MyAg expression with the clinical features,short-term efficacy and 5-year overall survival were assessed in the two groups.Results MyAg expression was detected in 46.5％ out of 103 cases and CD13,CD33 were the most commonly expressed MyAg(34.2％ and 21.4％ respectively).The expression of CD34 in MyAg+ ALL group was higher than MyAgALL group(75.3％ vs 60.5％,P ＜0.05).The expression of MyAg in T-ALL group (66.7％) was higher than B-ALL group (42.8％) (P ＜ 0.05).The clinical and biological characteristics of ALL patients between MyAg+ and MyAggroups showed that higher percentage of incoincidence of classification between morphology and immunology.Conclusion MyAg expression was not correlated with clinical characteristics and prognosis of ALL patients.