The immunophenotyping usually reveals the non expression in T, B lineage, while the myeloid lineage expressions are polymorphic, but only in a few APL cases the HLA DR antigen may be in low expression.

• 免疫表现为不表达T、B淋巴细胞抗原性，粒系抗原表达呈多态性，但部分病例HLA－DR抗原呈阳性或低表达。