Chromosome 3q21 abnormalities associated with hyperactive thrombopoiesis in
acute blastic transformation of chronic myeloid leukemia
R Bernstein, A Bagg, M Pinto, D Lewis and B Mendelow
Two patients with acute blastic transformation of chronic myeloid leukemia
(CML) associated with strikingly elevated platelet counts showed
abnormalities of chromosome 3q in addition to the standard Philadelphia
(Ph1) chromosome translocation. The first patient had an inversion of
chromosome 3 (q21q26) cytologically identical to an inversion 3 previously
reported in de novo acute megakaryoblastic leukemia, and the second patient
showed a translocation between chromosome 3q and the chromosome 9 homologue
not involved in the Ph1 translocation, [t(3;9)(q21;q34)]. Previous studies
had incriminated either 3q21 or 3q26 as the locus for a regulatory
thrombopoietic gene, but the current study suggests that 3q21 is the
relevant site.
Volume 68,
Issue 3,
pp. 652-657,
09/01/1986
Copyright © 1986 by The American Society of Hematology