Brad S Kahl | Search PubMed

PubMed2026

Consolidation Therapy Based on Mutation Clearance in Acute Myeloid Leukemia.

BACKGROUND: Optimal consolidation therapy for patients with intermediate-risk acute myeloid leukemia (AML) in first complete remission (CR1) is controversial. Retrospective studies have suggested that the clearance of leukemia-associated mutations (LAMs) in CR1 may predict lower relapse risk and better outcomes with high-dose cytarabine (HiDAC) consolidation. We tested this hypothesis prospectively. METHODS: We performed a phase II, multicenter study of intermediate-risk, transplant-eligible, de novo AML in patients 18-60 years of age who achieved a complete remission (CR) or CR with incomplete count recovery (CRi) after induction therapy. Tumor and normal whole-exome sequencing was performed at presentation to identify somatic LAMs (median ∼30 LAMs/patient). In remission marrow samples, LAM variant allele frequencies (VAFs) were then remeasured using a VAF cutoff of less than 2.5% to define clearance. Patients who met this LAM clearance threshold received HiDAC consolidation, whereas those with persistent LAMs (VAF ≥2.5%) were recommended to undergo allogeneic hematopoietic cell transplantation. The primary endpoint compared relapse-free survival (RFS) of intermediate-risk patients with complete LAM clearance to historical cohorts with intermediate-risk AML who received HiDAC-based regimens in CR1. To account for an unplanned interim assessment, the significance threshold for the primary analysis was 0.01. RESULTS: Among 100 patients who were evaluated, intermediate-risk patients who cleared all LAMs in CR1 (n=33) had a median RFS of 33.1 months (95% confidence interval, 11.7-NA) compared to a median RFS of 11.7 months in the historical cohort (n=239; 95% confidence interval, 9.9-15.6, P=0.015). CONCLUSIONS: Among patients with intermediate-risk AML, clearance of LAMs after induction, followed by HiDAC consolidation in CR1, was associated with longer RFS compared with similarly treated historical controls. Although this result did not meet the prespecified threshold for statistical significance, the reported association sets the stage for a randomized trial to further evaluate this strategy. (ClinicalTrials.gov number, NCT02756962.).

Humans↗

PubMed2022

The International Consensus Classification of Mature Lymphoid Neoplasms: a report from the Clinical Advisory Committee.

Since the publication of the Revised European-American Classification of Lymphoid Neoplasms in 1994, subsequent updates of the classification of lymphoid neoplasms have been generated through iterative international efforts to achieve broad consensus among hematopathologists, geneticists, molecular scientists, and clinicians. Significant progress has recently been made in the characterization of malignancies of the immune system, with many new insights provided by genomic studies. They have led to this proposal. We have followed the same process that was successfully used for the third and fourth editions of the World Health Organization Classification of Hematologic Neoplasms. The definition, recommended studies, and criteria for the diagnosis of many entities have been extensively refined. Some categories considered provisional have now been upgraded to definite entities. Terminology for some diseases has been revised to adapt nomenclature to the current knowledge of their biology, but these modifications have been restricted to well-justified situations. Major findings from recent genomic studies have impacted the conceptual framework and diagnostic criteria for many disease entities. These changes will have an impact on optimal clinical management. The conclusions of this work are summarized in this report as the proposed International Consensus Classification of mature lymphoid, histiocytic, and dendritic cell tumors.

Advisory Committees↗