ArticleBritish journal of cancer2026
TCF3::HLF-positive B-ALL: integrated clinical and molecular characterization of 34 cases from a single-center cohort.
Article in British journal of cancer, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundTCF3::HLF-positive B-cell acute lymphoblastic leukemia (B-ALL) is a rare, highly aggressive subtype with historically poor outcomes. Despite its classification as a distinct entity, its clinical and molecular landscape remains poorly understood.
methodsThis study presents a single-center cohort of 34 TCF3::HLF-positive B-ALL patients, providing comprehensive clinical and molecular characterization by integrating clinical data, treatment responses, survival outcomes, whole-transcriptome sequencing (WTS), targeted sequencing, and flow cytometry.
resultsTCF3::HLF accounted for 1.59% of B-ALL cases. Three fusion isoforms were identified, with Isoform III likely arising from alternative splicing. No significant clinical or transcriptomic differences were observed between Isoform I and II. The 5-year overall survival (OS) was 35.2%. Allogeneic hematopoietic stem cell transplantation (allo-HSCT) significantly improved OS and event-free survival (p < 0.0001), while chimeric antigen receptor T-cell (CAR-T) therapy facilitated allo-HSCT but lacked durable efficacy. RAS pathway mutations were prevalent (85.7%), and CD33 expression was frequent (79.4%), suggesting potential therapeutic targets. WTS analysis revealed dysregulation of epithelial-mesenchymal transition, coagulation, and immune pathways.
conclusionsTCF3::HLF-positive B-ALL represents an ultra-high-risk leukemia requiring allo-HSCT for long-term remission. CAR-T serves as a bridge to transplantation, while RAS and CD33-directed therapies warrant further investigation. These findings provide critical insights into disease biology and potential treatment.
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