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Updated: May 9, 2026

Oncogenic Gene Fusion Detection Using Anchored Multiplex Polymerase Chain Reaction Followed by Next Generation Sequencing
Published on: July 5, 2019
Atypical chronic myeloid leukemia with t(9;22)(p24,11.2), a BCR-JAK2 fusion gene
Marcelo Bellesso1, Rodrigo Santucci, Daniela Ferreira Dias
1Instituto HEMOMED, SP, Brazil.
Abstract:
We report here on a rare case of BCR-ABL1-negative atypical chronic myeloid leukemia with a t(9;22)(p24;q11.2)translocation and a BCR-JAK2 fusion gene, with resistance to the tyrosine kinase inhibitors imatinib and dasatinib.At two years of follow-up, the patient showed no hematologic response and was submitted to an allogeneic bonemarrow transplantation. Fifty-three days after the procedure, he died due to acute graft-versus-host disease. This BCR-JAK2 fusion gene has so far been found in only five patients in the whole world, with three clinical presentations: myeloproliferative neoplasm, acute lymphoblastic leukemia and acute myeloid leukemia.
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