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The aim of the present study was to investigate the clinical characteristics and prognosis of pediatric patients with B cell acute lymphoblastic leukemia (B-ALL) relapse. A total of 390 pediatric patients diagnosed as B-ALL and receiving regular chemotherapy in Jining First People's Hospital from August 2010 to May 2016 were selected. The clinical characteristics, therapeutic response and prognosis were compared between the two groups. There were significant differences in the comparisons of age, leukocyte count in the initial diagnosis and glucocorticoid sensitive test between B-cell ALL (B-ALL) relapse group and non-relapse group; the minimal residual disease (MRD) levels of pediatric patients in the two groups at 33 days and 12 weeks were significantly different. The 3-year event-free survival (EFS) rates of pediatric patients with early, medium and late B-ALL relapse were 12.5±7.8%, 33.1±9.8% and 63.6±6.1%, respectively, and the prognosis of late relapse was significantly better than that of early relapse (P&lt;0.001). The 3-year EFS rates of pediatric patients with bone marrow relapse in standard risk group, intermediate risk group and high risk group were 29.1±6.9, 31.3±6.5 and 28.3±6.3%, respectively; there were no statistically significant differences (P=0.387, P&gt;0.05). Pediatric patients with B-ALL relapse are characterized by higher onset age (≥10 years old), high leukocyte count and hormone insensitivity. Dynamic monitoring of MRD level in B-ALL pediatric patients can predict the relapse.

Clinical characteristics and prognosis of pediatric patients with B cell acute lymphoblastic leukemia relapse