title: Translocation (4;15)(p16;q24): a novel reciprocal translocation in a patient with BCR/ABL negative myeloproliferative syndrome progressing to blastic phase.
abstract: A patient with BCR/ABL negative myeloproliferative syndrome with a 46,XY,del(3)(q21), t(4;15)(p16;q24) karyotype is described. Fluorescence in situ hybridization performed with chromosomes 4 and 15 painting probes confirmed a novel reciprocal (4;15) translocation. The absence of crkl tyrosine phosphorylation, no activation of the abl kinase as measured by autophosphorylation, and a normal-size abl transcript suggest an alternative mechanism for leukemogenesis to that operative in Ph positive BCR/ABL positive chronic myeloid leukemia. A number of genes potentially relevant to tumorigenesis, some involving the ras signaling pathway, map to the 4p16 and 15q24 chromosome regions.
mesh_terms: D000210:Acute-Phase Reaction; D015153:Blotting, Western; D020223:Chromosome Painting; D002884:Chromosomes, Human, Pair 15; D002894:Chromosomes, Human, Pair 4; D018450:Disease Progression; D016044:Fusion Proteins, bcr-abl / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009196:Myeloproliferative Disorders / Q000235:genetics*; D010766:Phosphorylation; D014178:Translocation, Genetic