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Abstract |
Clinical, Immunologic, and Genetic Characteristics of T-lymphoblastic Leukemia with STIL-TAL1 Fusion |
Background: T-lymphoblastic leukemia (T-ALL) is an aggressive hematologic malignancy with a less favorable prognosis. The genetic background of T-ALL is widely heterogeneous, with the co-occurrence of multiple genetic abnormalities. The STIL-TAL1 rearrangement results from a submicroscopic deletion on chromosome 1p33 and is present in 15 - 25% of T-ALL cases. Submicroscopic deletions are not detected by conventional cytogenetic ana-lyses but can be identified through array comparative genomic hybridization and/or high-throughput RNA sequencing. Patients with the STIL-TAL1 fusion exhibit distinct characteristics, such as a young age, high white blood cell count, typical immunophenotype, and specific genetic abnormalities. However, the clinical, laboratory, and prognostic significance of this rearrangement remains unclear. This study was performed to identify STIL-TAL1 rearrangement resulting from submicroscopic 1p33 deletion in T-ALL and to investigate the clinical, immunologic, and genetic characteristics of T-ALL patients with STIL-TAL1 fusion.
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