【摘要】 目的 分析交叉抗原表达的急性白血病的临床特征及缓解率。 方法 对2009年10月-2010年11月血液内科的210例交叉表达髓系和淋巴细胞系相关抗原的初治急性白血病患者的标本，采用流式细胞术检测白血病细胞的免疫表型，根据免疫标记和FAB（French、American、Britain）分型进行分组，分析其异质性的生物学特征和影响缓解率的相关因素。 结果 210例急性白血病的FAB分型以AML-M1/M2（82例）和ALL（78例）为主；免疫分型以B淋巴细胞系和髓系混合表达多见（116例），其中CD34表达率高达91.4%（192例）， CD7表达率为50.5%（106例），且与CD34相关（P=0.04）；出现CD34、CD7、CD19三者共表达的患者缓解率较低（9.09%）。 结论 交叉抗原表达的急性白血病的诊断有赖于免疫分型的判断，其分化抗原的表达类型是影响其缓解率的重要因素。【Abstract】 Objective To observe the clinical characters of acute leukemia with cross-lineage antigen expression and analyze the remission rate. Methods Between October 2009 and November 2010, 210 patients were diagnosed and classified by morphology. Cytochemistry and immunology were used to analyze the immunophenotype. According to the immunostaining relative factors and FAB (French, American, and Britain) phenotype standard, the samples were divided into several groups. The conical characters and relative factors of remission rate were analyzed. Results In 210 patients with cross-lineage antigen expression, AL, AML-M1/M2 (82 cases) and ALL (78 cases) were common in FAB phenotype,and cross-lineage of B lineage and myelolineage were common in immunotype (116 cases). CD34 got the highest expression frequency of all (192 cases),and had the most important effect on patients′ prognosis. CD7 was also positive commonly (106 cases) and related with CD34 (P=0.04). So it′s significant for the outcome. The patients who got co-expression of CD34, CD7 and CD19 had worse prognoses. Conclusions Acute leukemia with cross-lineage antigen expression is a special type and is confirmed by immunotype. Furthermore, expression types of differentiation antigen are critical for the prognosis.