RESUMO
Resumen Justificación: El tumor de Wilms es el tumor renal maligno más frecuente en pediatría. El manejo terapéutico sigue el principio oncológico de curar la enfermedad mediante cirugía, quimioterapia y radioterapia. Se busca minimizar la toxicidad de los tratamientos. El objetivo del estudio fue describir las características clínicas, epidemiológicas y terapéuticas, con estimaciones sobre la supervivencia de los pacientes con diagnóstico de tumor de Wilms, atendidos en el Servicio de Oncología del Hospital Nacional de Niños "Dr. Carlos Sáenz Herrera", de la Caja Costarricense de Seguro Social, atendidos durante el periodo de enero de 2009 a diciembre de 2016. Métodos: Es un estudio observacional, descriptivo retrospectivo, de una serie de casos de pacientes pediátricos con tumor de Wilms atendidos durante un periodo de 8 años. Se revisó el expediente clínico para disponer de forma retrospectiva de los datos de todos los casos, según las variables de interés. Se aplicó análisis descriptivo de variables cualitativas y cuantitativas, así como para diseñar las curvas de supervivencia de Kaplan-Meier; se complementó con análisis inferencial. Resultados: Durante el periodo se atendió un total de 42 pacientes con este diagnóstico, de los cuales un 59,5 % fueron mujeres. La mayor prevalencia se registró en niños de 2 años o menos (66,7 %). Un 95,2 % de los pacientes presentó resultado de histología favorable; todos los casos con histología desfavorable fueron en mujeres. La intervención quirúrgica más común fue la nefrectomía. Todos los pacientes recibieron quimioterapia y solo el 38,1 % recibió radioterapia. Atribuido a la radioterapia, se reportó vómitos como el principal efecto adverso agudo. La supervivencia global estimada a 3 años fue del 85,6 %, y a 5 años fue del 79,9 %; la supervivencia libre de enfermedad fue del 78,8 % a los 3 y 5 años. Conclusiones: En pacientes pediátricos, el tumor de Wilms es una morbilidad oncológica que alcanza una baja frecuencia; aparece en ambos sexos, aunque con histología más desfavorable en mujeres. Ante este diagnóstico, los pacientes reciben tratamiento con cirugía, quimioterapia y radioterapia; la intervención múltiple ha sido exitosa y la gran mayoría de los pacientes alcanzan una supervivencia prolongada y libre de progresión de enfermedad, a los 5 años, los cuales están más cercanos a lo observado en países de ingresos medios.
Abstract Background: Wilms tumor is the most frequent malignant renal tumor in pediatrics. Therapeutic management follows the oncological principle of curing the disease through surgery, chemotherapy, radiotherapy. It seeks to minimize the toxicity of treatments. The objective of the study was todescribe the clinical, epidemiological and, therapeutic characteristics of patients diagnosed with Wilms tumor, treated at the Oncology Unit of the National Children's Hospital "Dr. Carlos Sáenz Herrera" CajaCostarricense de Seguro Social, during the period from January 2009 to December 2016. Methods: It is a descriptive, observational, retrospective study of one series of cases. The population analyzed were 42 pediatric patients with Wilms tumor for seven years. Medical records were revised retrospectively to collect data about all cases. The statistical analysis used qualitative variables and quantitative variables to descriptive and inferential techniques, and for survival analysis, Kaplan- Meier survival curves were used. Results: During a study period, a total of 42 patients diagnosed with Wilms tumor were studied. 59.5% were women. The prevalence is higher in children 2 years old or younger (66.7%). 95.2% of the patients presented favorable histology; and when discriminated by sex, 100.0% of unfavorable histology were women. The most common surgery was nephrectomy. All patients received chemotherapy and 38.1% radiotherapy. The main acute side effect of radiotherapy was vomiting. The estimated overall survival was 85.6% at 3 years, and 79.9% at 5 years and the disease-free survival was the same as 78.8% at 3 and 5 years. Conclusions: Wilms tumor exhibited low frequency in pediatric patients, in both sexes however bad histology most affected women. The patient received a combination of therapy with surgery, chemotherapy and, radiotherapy; his interventions have success and pediatric patients have longer overall survival and free disease progression survival at 5 years, like results of other average income countries.
Assuntos
Humanos , Lactente , Pré-Escolar , Tumor de Wilms/radioterapia , Tumor de Wilms/epidemiologia , Costa Rica , Hospitais PediátricosRESUMO
OBJECTIVE: Children with renal tumors included in clinical trials have significantly better outcomes. In Brasil, the enrollment of patients in clinical trials remains challenging. Here we aimed to describe participation accrual in the Brazilian Wilms Tumor Study Group (BWTSG) and to identify barriers to trial registration of children with renal tumors. METHODS: We determined the numbers of renal tumor diagnoses in 105 hospital-based cancer registries from 2001-2009. We then compared these totals with the numbers of renal tumor cases registered in the BWTSG from the same hospitals during the same time period. We also invited members of the Brazilian Pediatric Oncology Society to complete a 5-point Likert-type scale questionnaire regarding their opinions of the importance of participation in cooperative group trials. RESULTS: The accrual rate of patient participation per hospital varied from 25% to 76%, and was highest in the South region. The accrual rate of hospital participation also varied according to the region (20-31%) and was highest in the Southeast region. For the questionnaire regarding the importance of participation in cooperative groups, the responses showed an agreement of >75% on 10 of the 13 statements. CONCLUSION: Our results demonstrated low accrual of participation in a cooperative group trial in Brasil. We identified variations in registration rates according to geographic region and hospital, which may help targeted efforts to increase registration rates. The survey responses demonstrated that colleagues understand the importance of trial participation.
Assuntos
Participação do Paciente/estatística & dados numéricos , Tumor de Wilms/epidemiologia , Adolescente , Brasil/epidemiologia , Criança , Pré-Escolar , Humanos , Lactente , Recém-Nascido , Sistema de Registros/estatística & dados numéricos , Características de Residência , Inquéritos e Questionários , Taxa de SobrevidaRESUMO
SUMMARY OBJECTIVE Children with renal tumors included in clinical trials have significantly better outcomes. In Brasil, the enrollment of patients in clinical trials remains challenging. Here we aimed to describe participation accrual in the Brazilian Wilms Tumor Study Group (BWTSG) and to identify barriers to trial registration of children with renal tumors. METHODS We determined the numbers of renal tumor diagnoses in 105 hospital-based cancer registries from 2001-2009. We then compared these totals with the numbers of renal tumor cases registered in the BWTSG from the same hospitals during the same time period. We also invited members of the Brazilian Pediatric Oncology Society to complete a 5-point Likert-type scale questionnaire regarding their opinions of the importance of participation in cooperative group trials. RESULTS The accrual rate of patient participation per hospital varied from 25% to 76%, and was highest in the South region. The accrual rate of hospital participation also varied according to the region (20-31%) and was highest in the Southeast region. For the questionnaire regarding the importance of participation in cooperative groups, the responses showed an agreement of >75% on 10 of the 13 statements. CONCLUSION Our results demonstrated low accrual of participation in a cooperative group trial in Brasil. We identified variations in registration rates according to geographic region and hospital, which may help targeted efforts to increase registration rates. The survey responses demonstrated that colleagues understand the importance of trial participation.
RESUMO OBJETIVO Crianças com tumores renais incluídas em ensaios clínicos apresentam melhora significativa na sobrevida. No entanto, o envolvimento desses pacientes em ensaios clínicos continua sendo um desafio no Brasil. Nosso objetivo neste estudo é descrever a taxa de aderência e adesão no Grupo Cooperativo Brasileiro para tratamento de Tumor de Wilms (GCBTTW) e identificar barreiras na participação ao protocolo. MÉTODOS Identificamos o número de casos de tumores renais diagnosticados em 105 registros hospitalares de câncer no período de 2001 a 2009. O número total desses casos foi então comparado ao número de casos de tumores renais registrados no GCBTTW provenientes das mesmas unidades hospitalares e durante o mesmo período. Os membros da Sociedade Brasileira de Oncologia Pediátrica foram convidados para completar um questionário com escala do tipo likert com o objetivo de conhecer suas opiniões sobre a importância e as dificuldades na participação em ensaios clínicos de grupos cooperativos. RESULTADOS A aderência de pacientes por hospital variou de 25% a 76% e foi maior na região Sul. A adesão da participação do hospital também variou de acordo com a região (20-31%) e foi maior na região Sudeste. Com relação ao questionário referente à importância da participação em grupos cooperativos, as respostas mostraram concordância de mais de 75% em 10 das 13 afirmações. CONCLUSÃO Nossos resultados demonstraram uma baixa participação em grupos cooperativos no Brasil. Houve variações nas taxas de adesão e aderência de acordo com a região geográfica e unidade hospitalar, o que pode auxiliar em futuros esforços para a melhora dessas taxas. As respostas ao questionário demonstraram que os profissionais entendem a importância da participação em grupos cooperativos.
Assuntos
Humanos , Recém-Nascido , Lactente , Pré-Escolar , Criança , Adolescente , Participação do Paciente/estatística & dados numéricos , Tumor de Wilms/epidemiologia , Brasil/epidemiologia , Sistema de Registros/estatística & dados numéricos , Características de Residência , Taxa de Sobrevida , Inquéritos e QuestionáriosRESUMO
To identify underlying mechanisms involved with metastasis formation in Wilms tumors (WTs), we performed comprehensive DNA methylation and gene expression analyses of matched normal kidney (NK), WT blastemal component, and metastatic tissues (MT) from patients treated under SIOP 2001 protocol. A linear Bayesian framework model identified 497 differentially methylated positions (DMPs) between groups that discriminated NK from WT, but MT samples were divided in two groups. Accordingly, methylation variance grouped NK and three MT samples tightly together and all WT with four MT samples that showed high variability. WT were hypomethylated compared to NK, and MT had a hypermethylated pattern compared to both groups. The methylation patterns were in agreement with methylases and demethylases expression. Methylation data pointed to the existence of two groups of metastases. While hierarchical clustering analysis based on the expression of all 2569 differentially expressed genes (DEGs) discriminated WT and MT from all NK samples, the hierarchical clustering based on the expression of 44 genes with a differentially methylated region (DMR) located in their promoter region revealed two groups: one containing all NKs and three MTs and one containing all WT and four MTs. Methylation changes might be controlling expression of genes associated with WT progression. The 44 genes are candidates to be further explored as a signature for metastasis formation in WT.
Assuntos
Genes do Tumor de Wilms , Neoplasias Renais , Rim , Tumor de Wilms , Metilação de DNA , Progressão da Doença , Epigênese Genética , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , Rim/metabolismo , Rim/patologia , Neoplasias Renais/epidemiologia , Neoplasias Renais/genética , Masculino , Transcriptoma , Tumor de Wilms/epidemiologia , Tumor de Wilms/genéticaRESUMO
The objective of this study was to describe the epidemiology, clinical presentation, treatment and nephrology follow-up of children with Wilms tumor. Data from 46 patients were collected. The clinical presentation occurred at a young age (< 40 months old), with initial symptoms of pain, abdominal mass, and fever. The prevalent histology type was mixed nephroblastoma. All patients received pre-surgery chemotherapy followed by, in most cases, unilateral nephrectomy. Patients with a high histological risk had a 7.2 relative risk of death (75 % confidence interval: 1.5-33.7) compared to the rest, and a 2.5 relative risk of recurrence (75 % confidence interval: 1.0-6.4). Disease-free survival at 5 years was 70 %. Once cancer treatment was completed, 80 % of patients maintained a stage-I kidney function. The most important prognostic factor was histology. These patients required a long-term nephrology follow-up.
El objetivo de este trabajo fue describir la epidemiología, la presentación, el tratamiento y el seguimiento nefrológico de niños con tumor de Wilms. Se recopilaron datos de 46 pacientes. Se encontró baja edad de presentación (< 40 meses), con síntomas iniciales de dolor, masa abdominal y fiebre. La histología prevalente fue nefroblastoma tipo mixto. Todos los pacientes recibieron quimioterapia prequirúrgica seguida, en la mayoría de los casos, de nefrectomía unilateral. Los pacientes con alto riesgo histológico tuvieron un riesgo relativo de morir de 7,2 (IC 75 %: 1,5-33,7) con respecto al resto y de recidiva de 2,5 (IC 75 %: 1,0-6,4). La sobrevida libre de enfermedad a 5 años fue del 70 %. El 80 % mantuvo la función renal en estadio I al completar el tratamiento oncológico. El factor pronóstico más importante fue la histología. Estos pacientes requieren seguimiento nefrológico prolongado.
Assuntos
Neoplasias Renais , Tumor de Wilms , Adolescente , Argentina/epidemiologia , Criança , Pré-Escolar , Feminino , Hospitais Pediátricos , Humanos , Lactente , Neoplasias Renais/diagnóstico , Neoplasias Renais/epidemiologia , Neoplasias Renais/terapia , Masculino , Estudos Retrospectivos , Fatores de Tempo , Tumor de Wilms/diagnóstico , Tumor de Wilms/epidemiologia , Tumor de Wilms/terapiaRESUMO
El tumor de Wilms (TW) es el tumor renal maligno más frecuente en la infancia. Entre el 5-7% de los pacientes se presentan con enfermedad TW bilateral, de forma sincrónica o metacrónica. El TW bilateral generalmente ocurre en pacientes pequeños y más frecuentemente en niñas. La cirugía es un componente crítico en el tratamiento para lograr una alta tasa de curación preservando la mayor cantidad de masa renal. La quimioterapia preoperatoria a menudo reduce significativamente el tamaño del tumor, facilitando la cirugía posterior. Los pacientes con TW bilateral deben ser tratados en centros con experiencia en esta patología. El manejo de estos pacientes es aún un desafío (AU)
Wilms tumor (WT) is the most common malignant kidney tumor in childhood. Between 5-7% of the patients present with synchronous or metachronous bilateral WT. Bilateral WT typically occurs in young patients and most frequently in girls. Surgery is a critical component of the treatment as it has a high rate of cure while preserving the largest kidney mass. Preoperative chemotherapy often significantly reduces the size of the tumor, facilitating subsequent surgery. Patients with bilateral WT should be managed at centers with experience treating this disease. The management of these patients is still a challenge (AU)
Assuntos
Humanos , Recém-Nascido , Lactente , Pré-Escolar , Criança , Neoplasias Renais/cirurgia , Insuficiência Renal Crônica , Tumor de Wilms/tratamento farmacológico , Tumor de Wilms/epidemiologia , Tumor de Wilms/radioterapia , Tumor de Wilms/cirurgia , Estudos Transversais , Estudos RetrospectivosRESUMO
Abstract Objective To analyze and compare the health-related quality of life of adult survivors of acute lymphocytic leukemia and Wilms’ tumor amongst themselves and in relation to healthy participants. Methods Ninety participants aged above 18 years were selected and divided into three groups, each comprising 30 individuals. The Control Group was composed of physically healthy subjects, with no cancer history; and there were two experimental groups: those diagnosed as acute lymphocytic leukemia, and those as Wilms’ Tumor. Quality of life was assessed over the telephone, using the Medical Outcomes Study 36-Item Short Form Health Survey. Results Male survivors presented with better results as compared to female survivors and controls in the Vitality domain, for acute lymphocytic leukemia (p=0.042) and Wilms’ tumor (p=0.013). For acute lymphocytic leukemia survivors, in Social aspects (p=0.031), Mental health (p=0.041), and Emotional aspects (p=0.040), the latter also for survivors of Wilms’ tumor (p=0.040). The best results related to the Functional capacity domain were recorded for the experimental group that had a late diagnosis of acute lymphocytic leukemia. There were significant differences between groups except for the Social and Emotional domains for self-perceived health, with positive responses that characterized their health as good, very good, and excellent. Conclusion Survivors of acute lymphocytic leukemia showed no evidence of relevant impairment of health-related quality of life. The Medical Outcomes Study 36-Item Short Form Health Survey (via telephone) can be a resource to access and evaluate survivors.
Resumo Objetivo Analisar e comparar a qualidade de vida relacionada à saúde de sobreviventes adultos de leucemia linfocítica aguda e tumor de Wilms entre si, e em relação a participantes sadios. Métodos Foram selecionados noventa participantes, acima de 18 anos, os quais foram divididos em três grupos, sendo cada um com 30 sujeitos: Grupo Controle, que contou com indivíduos fisicamente saudáveis, sem histórico oncológico; grupo experimental formado por pacientes que tiveram diagnóstico de leucemia linfocítica aguda; e grupo experimental formado por pacientes que tiveram diagnóstico de Tumor de Wilms. A avaliação da qualidade de vida foi realizada por telefone e utilizou o Medical Outcomes Study 36-Item Short Form Health Survey. Resultados Os sobreviventes do sexo masculino apresentaram melhores resultados em relação aos do sexo feminino e controles no Aspecto vitalidade, para leucemia linfocítica aguda (p=0,042) e tumor de Wilms (p=0,013). Para os sobreviventes de leucemia linfocítica aguda nos Aspectos sociais (p=0,031), Saúde mental (p=0,041) e Aspectos emocionais (p=0,040), neste último também para as sobreviventes de Tumor de Wilms (p=0,040). Os melhores resultados relacionados ao domínio Capacidade funcional foram registrados para o grupo experimental de pacientes que tiveram diagnóstico tardio de leucemia linfocítica aguda. Observaram-se diferenças significativas entre os grupos, exceto para os domínios Aspectos sociais e emocionais para a percepção da própria saúde, que teve respostas de cunho positivo, que qualificavam a própria saúde como boa, muito boa e excelente. Conclusão O grupo experimental de pacientes que tiveram diagnóstico de leucemia linfocítica aguda não apresentou evidências de comprometimento relevante da qualidade de vida relacionada à saúde. O Medical Outcomes Study 36-Item Short Form Health Survey (via telefone) pode ser um recurso de acesso e avaliação de sobreviventes.
Assuntos
Adolescente , Adulto , Feminino , Humanos , Masculino , Adulto Jovem , Neoplasias Renais/epidemiologia , Leucemia-Linfoma Linfoblástico de Células Precursoras/epidemiologia , Qualidade de Vida , Autorrelato , Sobreviventes/psicologia , Tumor de Wilms/epidemiologia , Idade de Início , Análise de Variância , Estudos de Casos e Controles , Seguimentos , Indicadores Básicos de Saúde , Neoplasias Renais/psicologia , Leucemia-Linfoma Linfoblástico de Células Precursoras/psicologia , Fatores Sexuais , Fatores Socioeconômicos , Taxa de Sobrevida , Telefone , Tumor de Wilms/psicologiaRESUMO
OBJECTIVE: To analyze and compare the health-related quality of life of adult survivors of acute lymphocytic leukemia and Wilms' tumor amongst themselves and in relation to healthy participants. METHODS: Ninety participants aged above 18 years were selected and divided into three groups, each comprising 30 individuals. The Control Group was composed of physically healthy subjects, with no cancer history; and there were two experimental groups: those diagnosed as acute lymphocytic leukemia, and those as Wilms' Tumor. Quality of life was assessed over the telephone, using the Medical Outcomes Study 36-Item Short Form Health Survey. RESULTS: Male survivors presented with better results as compared to female survivors and controls in the Vitality domain, for acute lymphocytic leukemia (p=0.042) and Wilms' tumor (p=0.013). For acute lymphocytic leukemia survivors, in Social aspects (p=0.031), Mental health (p=0.041), and Emotional aspects (p=0.040), the latter also for survivors of Wilms' tumor (p=0.040). The best results related to the Functional capacity domain were recorded for the experimental group that had a late diagnosis of acute lymphocytic leukemia. There were significant differences between groups except for the Social and Emotional domains for self-perceived health, with positive responses that characterized their health as good, very good, and excellent. CONCLUSION: Survivors of acute lymphocytic leukemia showed no evidence of relevant impairment of health-related quality of life. The Medical Outcomes Study 36-Item Short Form Health Survey (via telephone) can be a resource to access and evaluate survivors.
Assuntos
Neoplasias Renais/epidemiologia , Leucemia-Linfoma Linfoblástico de Células Precursoras/epidemiologia , Qualidade de Vida , Autorrelato , Sobreviventes/psicologia , Tumor de Wilms/epidemiologia , Adolescente , Adulto , Idade de Início , Análise de Variância , Estudos de Casos e Controles , Feminino , Seguimentos , Indicadores Básicos de Saúde , Humanos , Neoplasias Renais/psicologia , Masculino , Leucemia-Linfoma Linfoblástico de Células Precursoras/psicologia , Fatores Sexuais , Fatores Socioeconômicos , Taxa de Sobrevida , Telefone , Tumor de Wilms/psicologia , Adulto JovemRESUMO
AIM: Embryonic tumors are associated with an interruption during normal organ development; they may be related to disturbances in the folate pathway involved in DNA synthesis, methylation, and repair. Prenatal supplementation with folic acid is associated with a decreased risk of neuroblastoma, brain tumors, retinoblastoma, and nephroblastoma. The aim of this study was to investigate the association between MTHFR rs1801133 (C677T) and RFC-1 rs1051266 (G80A) genotypes with the risk of developing nephroblastoma and neuroblastoma. MATERIALS AND METHODS: Case-mother/control-mother dyad study. Samples from Brazilian children with nephroblastoma (n=80), neuroblastoma (n=66), healthy controls (n=453), and their mothers (case n=93; control n=75) were analyzed. Genomic DNA was isolated from peripheral blood cells and/or buccal cells and genotyped to identify MTHFR C677T and RFC-1 G80A polymorphisms. Differences in genotype distribution between patients and controls were tested by multiple logistic regression analysis. RESULTS: Risk for nephroblastoma and neuroblastoma was two- to fourfold increased among children with RFC-1 polymorphisms. An increased four- to eightfold risk for neuroblastoma and nephroblastoma was seen when the child and maternal genotypes were combined. CONCLUSION: Our results suggest that mother and child RFC-1 G80A genotypes play a role on the risk of neuroblastoma and nephroblastoma since this polymorphism may impair the intracellular levels of folate, through carrying fewer folate molecules to the cell interior, and thus, the intracellular concentration is not enough to maintain regular DNA synthesis and methylation pathways.
Assuntos
Neoplasias Renais/genética , Metilenotetra-Hidrofolato Redutase (NADPH2)/genética , Mães , Proteínas de Neoplasias/genética , Neuroblastoma/genética , Polimorfismo de Nucleotídeo Único , Proteína de Replicação C/genética , Tumor de Wilms/genética , Brasil/epidemiologia , Estudos de Casos e Controles , Criança , Pré-Escolar , Feminino , Ácido Fólico/metabolismo , Frequência do Gene , Predisposição Genética para Doença , Genótipo , Humanos , Lactente , Recém-Nascido , Masculino , Neuroblastoma/epidemiologia , Risco , Tumor de Wilms/epidemiologiaRESUMO
BACKGROUND: Wilms tumor (WT) is the most common renal malignancy of childhood. The aim of this study was to verify the epidemiological profile and prognosis of a sample of patients from Brazil and compare them to similar data from other Latin American studies. METHOD: The sample consisted of consecutive patients diagnosed with WT in an oncohematology service of a referral hospital in Southern Brazil, between 1989 and 2009. Clinical, radiological, pathological and survival data were collected from the medical records. Analysis was done using Excel and SPSS version 18.0. The significance level was set at P < 0.05. RESULTS: The final sample consisted of 45 patients. The male/female ratio was 1.25:1. Mean age at diagnosis was 43.9 months and all patients were of European descent. Thirty-three patients (73.3%) had both signs/symptoms of abdominal mass and hypertension. Malformation was observed in nine patients (20%) and there was one case of Fanconi's anemia (2.2%). Three patients had bilateral disease (6.7%). The majority of patients had stage III and IV (62.2%). Patients with malformation had an earlier age at diagnosis (P = 0.018) and a higher prevalence of bilateral disease (P = 0.044). Overall survival was 75%. Age at diagnosis was the only significant independent predictor associated with death. CONCLUSION: Death is closely related to late diagnosis in WT. Oncologic services should also be concerned about morbidity caused by therapeutic options in cases of late diagnosis, and the consequences for quality of life.