PMID: 6603258Aug 1, 1983

Near-haploid cell line in the blastic crisis of chronic myelogenous leukemia: a possible marker for lymphoid malignancy

Cancer Genetics and Cytogenetics
T M NajafzadehJ Katz


The blast cells of a 14-year-old patient in the blastic phase of chronic myelogenous leukemia (CML) were studied. Cellular morphology, presence of the enzyme terminal deoxynucleotidyl transferase (TdT), and reactivity to the common acute lymphoblastic leukemia antiserum (CALLA) substantiated a lymphoid blast cell line. Immunologic surface markers were nonreactive for E-rosette (T) cells and immunoglobulin-bearing (B) cells. Cytogenetic, studies revealed persistance of the Philadelphia chromosome and a near-haploid cell line, i.e., 28,XY,t(9;22), +14, +15, +21, +22(GTG). The patient responded to chemotherapy with vincristine, prednisone, and L-asparaginase, first line drugs used for remission-induction of acute lymphoblastic leukemia in childhood. We suggest that severe hypodiploidy or near-haploidy, along with TdT and CALLA, may provide more accurate prognostic information in patients with CML and the lymphoid blastic crisis.


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