What question did this study set out to answer?

To assess minimal residual disease as a continuous variable integrated with genetic subtypes to refine relapse risk stratification in pediatric acute lymphoblastic leukemia.

November 13, 2017Journal of Clinical OncologyOpen Access

Genotype-Specific Minimal Residual Disease Interpretation Improves Stratification in Pediatric Acute Lymphoblastic Leukemia

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To assess minimal residual disease as a continuous variable integrated with genetic subtypes to refine relapse risk stratification in pediatric acute lymphoblastic leukemia.
Analyzed a population-based cohort of 3,113 patients treated in the UKALL2003 study with a median follow-up of 7 years.
Measured minimal residual disease (MRD) at the end of induction using polymerase chain reaction analysis of Ig/TCR gene rearrangements.
Assigned patients to genetic subtypes using immunophenotype, cytogenetics, and fluorescence in situ hybridization, evaluating log-transformed absolute MRD values across subgroups.
MRD distributions at end of induction differed significantly among genetic subtypes (P < .001), clearing fastest in good-risk cytogenetics and slower in high-risk genetics and T-cell acute lymphoblastic leukemia.
Relapse risk strongly correlated with MRD kinetics, with each log reduction in disease level decreasing risk by 20% (HR, 0.80; 95% CI, 0.77 to 0.83; P < .001).
Absolute relapse rates linked to specific MRD values varied significantly across genetic subtypes, demonstrating that integrating subtype-specific thresholds provides more accurate stratification than a single cutoff.

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Implication

Cohort study reveals that genotype-specific minimal residual disease kinetics predict relapse risk in pediatric acute lymphoblastic leukemia, suggesting integrated risk stratification improves...

Cite This Study

O’Connor et al. (2017) studied this question.

synapsesocial.com/papers/6a105fbe10ed65f1d0fcbf6b https://doi.org/10.1200/jco.2017.74.0449

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Implication

Cohort study reveals that genotype-specific minimal residual disease kinetics predict relapse risk in pediatric acute lymphoblastic leukemia, suggesting integrated risk stratification improves...

Genotype-Specific Minimal Residual Disease Interpretation Improves Stratification in Pediatric Acute Lymphoblastic Leukemia

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Discussion

Implication

Cite This Study

Genotype-Specific Minimal Residual Disease Interpretation Improves Stratification in Pediatric Acute Lymphoblastic Leukemia

Key Points

Discussion

Implication

Cite This Study

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