Abnormal expression of cCD79a/cCD22 in acute myeloid leukemia with t (8;21) / 中华血液学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To report abnormal expression of cCD79a/cCD22 in four cases of acute myeloid leukemia (AML) with t (8;21).</p><p><b>METHODS</b>The characteristics of morphology, immunophenotype, chromosome karyotype (MIC) and clinical manifestations of 4 AML patients with t (8;21) expressing cCD79a/cCD22 were analyzed.</p><p><b>RESULTS</b>The features of the 4 patients were (1) no difference in gender; (2) young age; (3) exmedullary infiltration may be present; (4) normal number of white blood cells in peripheral blood; (5) morphology showed acute myeloid leukemia with high percentage of blast cells; (6) B-lymphoid and myeloid immunophenotype, and high expression of CD34; (7) frequent depletion of Y chromosome and complex changes of chromosomes; (8) positive for AML1/ETO fusion gene; (9) response well to chemotherapy regimen which simultaneously treated myeloid and lymphocytic leukemia.</p><p><b>CONCLUSION</b>Abnormal expression of cCD79a/cCD22 in AML with t (8;21) (q22;q22) suggested that this kind of leukemia might be related with abnormal expression gene of B cell.</p>