Cytogenetic risk groups for childhood acute myeloid leukemia based on survival analysis in a cancer referral hospital from Perú
Abstract
Introduction: Acute myeloid leukemia is a heterogeneous disorder characterized by immature myeloid cell proliferation. Cytogenetic analysis has revealed the presence of chromosomal aberrations important to patient prognosis.
Objective: To determine cytogenetic risk groups of pediatric patients with acute myeloid leukemia according to overall survival.
Materials and methods: In this cross-sectional observational study, the clinical records of pediatric patients diagnosed with de novo acute myeloid leukemia admitted to the Instituto Nacional de Enfermedades Neoplásicas between 2001 and 2011 with cytogenetic analysis of bone marrow were included. Cytogenetic risk groups were established according to the criteria of the Medical Research Council. Overall survival curves were generated with the Kaplan-Meier method and compared using the Mantel-Cox test and Cox regression with the software R, version 3.3.2.
Results: A total of 130 patients were included, 68 males (52.3%) and 62 females (47.7%), most of them with subtype M2 (33%). The average age was 7.7 years (range: 0-15 years). Chromosomal aberrations were observed in 60.8% of the patients, the most frequent of which was the translocation t(8;21). According to the overall survival analysis, two cytogenetic risk groups were established: favorable and unfavorable.
Conclusion: Two groups of cytogenetic risk were determined: high (or unfavorable) and standard (favorable).
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References
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