Epidemiological evaluation and survival of children with acute myeloid leukemia

Abstract Objective: This study aims to describe the epidemiological characteristics and survival rates of children with acute myeloid leukemia treated in hospitals in southern Brazil and compare them with international data. Methods: A multicenter cohort study was conducted with retrospective data collection of all new patients with acute myeloid leukemia under 18 treated at five referral centers in pediatric hematology-oncology in southern Brazil between January 2005 and December 2015. Results: Of the 149 patients with acute myeloid leukemia, 63.0% (n = 94) were male. The median age at diagnosis was 10.5 years (range 0-18 years) and 40.3% (n = 60) had a white blood cell count below 50,000/mm2. The most common Franco-American-British (FAB) subtype was M3 (n = 43, 28.9%). Nine (6.0%) patients had central nervous system disease. In M3 patients, overall survival (OS) was 69.2% and 3-year event-free survival was 67.7%; in non-M3 patients, these rates were 45.3% and 36.7%, respectively. In non-M3 patients, OS was significantly different between transplanted (61.8%) and non-transplanted (38.2%) patients (p = 0.031). Conclusions: These results show a higher prevalence of the Franco-American-British M3 subtype than that reported in the international literature, as well as a decreased OS compared with that of developed countries. Further multicenter Brazilian studies with a larger sample size are encouraged to better understand the characteristics of acute myeloid leukemia, and to improve the treatment and prognosis in this population.

Síndrome da Morte Súbita Infantil em Pelotas de 2006 a 2013: uma análise descritiva / Sudden Infant Death Syndrome in Pelotas from 2006 to 2013: a descriptive analysis

Introdução e objetivo: A Síndrome da Morte Súbita Infantil (SMSI) ocupa a oitava posição entre as causas de anos potenciais de vida perdidos e as primeiras posições como causa de mortalidade infantil pós-neonatal em países desenvolvidos. O presente estudo objetiva conhecer as características socioepidemiológicas das crianças que foram a óbito por SMSI no município de Pelotas. Métodos: Estudo observacional, retrospectivo, descritivo baseado nos dados da Secretaria Municipal de Saúde, coletados através da aplicação de Fichas de Investigação de óbitos padronizadas pelo Ministério da Saúde de todos os casos de SMSI que ocorreram do ano de 2006 a 2013 em Pelotas/RS. Resultados: Houve 37 óbitos registrados no período, o que representa um coefi ciente de mortalidade por SMSI de 1,5 por mil. A média de idade materna foi de 23,5 anos (dp=5,2), 29 (78%) eram fumantes e 23 (62%) concederam aleitamento materno exclusivo até a data do óbito, 28 (76%) tiverem seus bebês nascidos a termo. Dentre os 37 casos, 16 (43%) vieram a falecer com menos de 1 mês de vida, 26 (70%) dormiam junto aos pais e 23 (61%) em decúbito lateral, enquanto que apenas 2 (5%) em decúbito ventral e 16 (43%) dos casos de SMSI ocorreram durante o inverno. Conclusão: O presente estudo é o único que abrange tamanha amostra (37 casos) de SMSI na cidade de Pelotas, a qual apresenta um coefi ciente de mortalidade por essa patologia semelhante aos mais altos encontrados na literatura. Portanto, políticas públicas que visem à prevenção de SMSI em Pelotas são necessárias.

Introduction and aim: Sudden Infant Death Syndrome (SIDS) ranks eighth among the causes of potential years of life lost and is among the leading causes of post-neonatal infant mortality in developed countries. This study aimed to evaluate the social and epidemiological characteristics of children who died of SIDS in the city of Pelotas. Methods: An observational, retrospective, and descriptive study based on Municipal Health Department data collected by applying Research Sheets standardized by the Ministry of Health to all cases of SIDS occurring from 2006 to 2013 in Pelotas, South Brazil. Results: A total of 37 deaths were recorded in the studied period, placing the SIDS mortality rate at 1.5 per thousand. The mean maternal age was 23.5 years (SD = 5.2), 29 (78%) were smokers, 23 (62%) granted exclusive breastfeeding until the date of death, 28 (76%) had term infants. From the 37 cases, 16 (43%) died under 1 month of age, 26 (70%) were sleeping with their parents, and 23 (61%) in the lateral position, while only 2 (5%) in the prone position, and 16 cases (43%) of SIDS occurred during the winter. Conclusion: This study is the only one that covers such sample (37 cases) of SIDS in the city of Pelotas, whose mortality rate from this disorder is close to the highest in the literature. Therefore, public policies for the prevention of SIDS in Pelotas are required.