Immunophenotype and cytochemical reactions of acute lymphoblastic leukemia in Thai children

The immunophenotypes of acute lymphoblastic leukemia (ALL) in 28 Thai children were studied by the APAAP technique using a panel of eight specific monoclonal antibodies: HLA-DR, CD 19, CALLA (CD 10), IgM, CD 7, CD 3, CD 4, and CD 8. Sixty-eight, 18, 3.5, 3.5, and 7 per cent were respectively shown to be common, null, pre-B, B, and mature thymocyte T subtypes. Cytochemical reactions (beta-glucuronidase, alpha naphthyl acetate esterase, and acid phosphatase) in this study could identify null, common, and T ALLs with confidence, and could be used in the process of ALL subtyping to reduce cost.