Abstract:
:The case of a patient presenting with a myeloproliferative disorder (MPD) characterized by a t(8;22) (p12;q11) translocation was investigated. The rearrangement resulted in the production of BCR-FGFR1 and FGFR1-BCR chimeric transcripts after in-frame fusions of BCR exon 4 with FGFR1 exon 9 and FGFR1 exon 8 with BCR exon 5, respectively. The four previously reported patients with such translocation presented with an atypical chronic myeloid leukemia (CML) without Philadelphia chromosome. In addition to a myeloproliferation, the patient had a B cell proliferation. The phenotypic characterization of the lymphoid cells in the bone marrow showed a continuum of maturation from blast B cells to polyclonal lymphocytes. In the blood, B cells showed a complete polyclonal maturation. The BCR-FGFR1 gene fusion was detected by dual-color fluorescence in situ hybridization in both CD19- and CD19+ populations. In contrast to the other FGFR1-MPDs that show myeloid and T cell proliferation, we propose that this t(8;22) MPD is a myeloid and B cell disease, and potentially a novel type of hematological disease. Although the FGFR1-MPD is rare, its study provides interesting clues to the understanding of hematopoietic stem cell biology and oncogene activation.
journal_name
Int J Oncoljournal_title
International journal of oncologyauthors
Murati A,Arnoulet C,Lafage-Pochitaloff M,Adélaide J,Derré M,Slama B,Delaval B,Popovici C,Vey N,Xerri L,Mozziconacci MJ,Boulat O,Sainty D,Birnbaum D,Chaffanet Mkeywords:
subject
Has Abstractpub_date
2005-06-01 00:00:00pages
1485-92issue
6eissn
1019-6439issn
1791-2423journal_volume
26pub_type
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