Childhood leukemia: Brazilian reality in children under fifteen years.

Leukemia is among the most prevalent cancers in children and adolescents in Brazil, affecting about 75% of children's public, especially males. Therefore, the southeast region of Brazil has a higher prevalence of cases, in which from 2019 to 2022 there were 1710 leukemia cases. In addition, the average of general notifications had higher frequency in 2021 with 1761 diagnoses, with higher emphasis on the southeast region, presenting 495 cases this year.