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Promyelocytic blast crisis in chronic granulocytic leukemia with 15;17 translocation
A patient with Philadelphia chromosome Ph1-positive chronic granulocytic leukemia (CGL) developed an acute transformation associated with a hemorrhagic diathesis and bone marrow infiltration by hypergranular promyelocytes and blasts. Cytogenetic analysis of bone marrow metaphase cells at transformation showed a t(15;17) superimposed upon the Ph1-positive cell line. These findings suggest a critical relationship between the t(15;17) and arrest of myeloid leukemic cell differentiation at the promyelocyte stage.
A patient with Philadelphia chromosome Ph1-positive chronic granulocytic leukemia (CGL) developed an acute transformation associated with a hemorrhagic diathesis and bone marrow infiltration by hypergranular promyelocytes and blasts. Cytogenetic analysis of bone marrow metaphase cells at transformation showed a t(15;17) superimposed upon the Ph1-positive cell line. These findings suggest a critical relationship between the t(15;17) and arrest of myeloid leukemic cell differentiation at the promyelocyte stage.