ObjectiveTo estimate the incidence of retinoblastoma in children and adolescents in Brazil based on Population-Based Cancer Registry (PBCR), describing temporal trends and some quality indicators of this registry.MethodsBased on secondary data from the PBCR of the National Institute of Cancer (INCA) (2000–2018), by selecting the morphological code of retinoblastoma, the annual incidences per million (0–19 years of age) in each local PBCR were estimated by sex and age group, global combined and by region, in addition to the percentage of diagnosis only by death certificate (DC) or not informed (NI), and the male/female ratio (M/F). An annual incidence trend in the five Brazilian geographic regions was also analyzed using the inflection point regression technique.Results675 patients were identified in 28 PBCR, 91% between 0 and 4 years of age. The overall combined incidence per million by age group was: 7.02 (0–4 years old), ranging from 5.25 in the Midwest to 11.26 in the Northeast; 0.46 (5–9 years old); 0.05 (10–14 years old) and 0.03 (15–19 years old). The combined incidence per million, adjusted for the world population, was 2.23 (0–14 years old) and 2.24 (0–19 years old). The DC and NI percentages were 13% and 18%, respectively; the M/F ratio was 1.3. The incidence remained stable throughout the study period, except for the city of São Paulo, where there was a significant reduction of 3.4% per year.ConclusionsIn Brazil, except for the Northeast region, the incidences of retinoblastoma were lower than those reported in several countries worldwide, suggesting possible underreporting, and the time series analysis showed a stable trend. Although this pioneering study brings a recent panel of available data on retinoblastoma in Brazil, more precise estimates are needed and welcome for better planning of onco-ophthalmologic care in the country.

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RESUMOObjetivo: Identificar causas relacionadas com a não aderência ao tratamento do glaucoma primário de ângulo aberto e sugerir meios para posteriormente minimizá-las. Métodos: Foi aplicado um questionário a pacientes portadores de glaucoma primário de ângulo aberto no Hospital Universitário Gaffrée e Guinle, escolhidos aleatoriamente, para avaliação dos fatores relacionados com a interrupção do tratamento. Para isso, utilizou-se uma análise univariada, pelo teste exato de Fisher, e considerou estatisticamente significativo p<0,05. Resultados: A partir do questionário, identificou-se dois subgrupos, um que já havia interrompido o tratamento e outro que nunca o havia interrompido, compostos por 25 e 11 pacientes respectivamente. Estes grupos foram comparados entre si e todos os parâmetros analisados. O custo dos medicamentos (p=0,001) e o fator esquecimento (p=0,007) foram estatisticamente relevantes para a interrupção do tratamento da doença. As demais variáveis testadas não obtiveram significância estatística. Conclusão: O custo dos medicamentos e o fator esquecimento foram os fatores mais importantes para interrupção do tratamento.Descritores: Glaucoma/terapia; Adesão ao tratamento; Glaucoma primário de ângulo aberto/terapia; Custos de medicamentos; Suspensão de tratamento ABSTRACTThe objective was to identify causes related to noncompliance of primary open-angle glaucoma and suggest ways to minimize them later. A questionnaire was given to patients with primary open angle glaucoma in Hospital Gaffrée Guinle, chosen randomly, to assess factors related to discontinuation of treatment. For this we used a univariate analysis by Fisher's exact test and considered statistically significant p <0.05. From the questionnaire, we identified two sub-groups, who had stopped treatment and another who had never stopped for 25 compounds and 11 patients respectively. These groups were compared, and all parameters examined. The cost of drugs (p = 0.001) and forgetting factor (p = 0.007) were statistically significant for discontinuation of treatment of disease. The other variables tested did not achieve statistical significance. Conclusion: The cost of drugs and forgetting to take medication were the factors most important to withholding treatment

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