111例儿童急性淋巴细胞白血病免疫表型的特点分析

目的 探讨儿童急性淋巴细胞白血病(ALL)免疫表型特征和诊断价值.方法 应用直接免疫荧光标记以CD45/SSC双参数散点图设门法对111例初治儿童ALL行流式细胞术分析,并探讨形态学分型与免疫分型的关系.结果 本组ALL免疫表型特点:①B系ALL 81例(73.0%),T系ALL 16例(14.4%),B/T-ALL 14例(12.6%);②伴髓系抗原表达者(My+-ALL)25例(22.5%);③FAB分型L1型59例(53.2%),L2型47例(42.3%),L3型2例(1.8%,Ⅰ型旱前B型和成熟B型各1例).急性粒细胞白血病(M2a)1例(0.9%,为Ⅰ型早期前B型ALL),形态学无法分类2例(均为Ⅱ型早前B型ALL).结论 免疫分型有助于明确白血病性质,是儿童ALL诊断的必要手段.

Characteristics of acute lymphocytic leukemia immunophenotype in 111 children

Objective To study the characteristics of child acute lymphocytic leukemia (ALL) immuno-phenotype and evaluate its diagnosis value. Methods Direct immunofluorescence staining and CD45/Side Scatter (SSC) gating of flow cytometry were used for immunophenotyping in 111 cases of child ALL. The relation of mor-phology and immunology classification was analyzed. Results Three categories could be identified,including 81 ca-ses (73.0%) of B lineage ALL, 16 cases (14.4%) of T lineage ALL and 14 cases (12.6% ) of B/T lineage ALL. There were 25 cases (22.5% ) of ALL expressing myeloid-associated antigens. According to the FAB Morphology classification,59 cases (53.2%) of L1 type and 47 cases (42.3%) of L2 type were diagnosed. The two cases (1.8%) of L3 type were classified as one case of null-ALL and one case of B-ALL. One case (0.9%)of acute my-eloblastic leukemia (AML-M2a) was identified as null-ALL. The two cases that could not be diagnosed by FAB clas-sification were c-ALL. Conclusion The immunophenotyping helps to identify the character of leukemia with an im-portant value in diagnosis of child ALL.