Journal
LEUKEMIA RESEARCH
Volume 33, Issue 11, Pages 1552-1555Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.leukres.2009.04.033
Keywords
Acute promyelocytic leukemia; Masked PML/RAR alpha; 4q2l; All-trans retinoic acid
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Most cases of acute promyelocytic leukemia (APL) are characterized by the reciprocal translocation t(15;17); however, several complex variant translocations have also been reported. Here we report complex cytogenetic abnormalities without t(15;17) assayed by the G-banding method in a 62-year-old woman with the typical morphology and clinical features of APL Based on spectral karyotyping and FISH analyses, we confirm the insertion of a cryptic chromosomal segment containing the PML/RAR alpha fusion gene. The patient achieved complete remission after treatment with all-trans retinoic acid (ATRA) alone. Although the mechanism of this cryptic variant insertion is not known, we conclude that the insertion of PML-RAR alpha fusion into 4q21 seems not to alter the effectiveness of treatment with ATRA. (C) 2009 Elsevier Ltd. All rights reserved.
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