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O Atlas Brasileiro Online de Doenças Raras é um serviço da Rede Nacional de Doenças Raras. Ele foi criado para disseminar informações sobre epidemiologia, quadro clínico, recursos diagnósticos e terapêuticos usados, e custos relacionados a doenças raras de origem genética e não genética no Brasil.
As doenças raras podem ser definidas como aquelas que afetam até 65 pessoas em cada 100 mil, ou seja, 1,3 pessoas para cada 2.000 indivíduos. No Brasil, estima-se que cerca de treze milhões de pessoas possuem alguma doença rara.
Após coletar, armazenar, processar e analisar os dados provenientes do projeto Rede Nacional de Doenças Raras, produzimos e publicamos estudos científicos para revistas e conferências científicas nacionais e internacionais.
Portanto, bem-vindo(a) a nossa lista de publicações. Essas publicações científicas representam um esforço contínuo para o entendimento e a explicação de fenômenos na área das doenças raras.
Esses esforços visam fornecer subsídios úteis e relevantes para a tomada de decisão baseadas em evidências no campo das doenças raras. Corroborando assim para o cumprimento dos objetivos gerais e específicos deste projeto.
Homocistinúria Clássica: Dados da Jornada Assistencial da Rede Nacional de Doenças Raras
Mariana Lopes dos Santos, Bibiana Mello de Oliveira, Milena Artifon, Ney Boa Sorte, Ana Maria Martins, Carlos Eduardo Steiner, Maria Denise Fernandes Carvalho de Andrade, Marcelo Nita, Ida Vanessa Doederlein Schwartz, Têmis Maria Félix
Ruy Pires de Oliveira Sobrinho, Simone Appenzeller, Ianne Pessoa Holanda, Júlia Lôndero Heleno, Josep Jorente, Rare Genomes Project Consortium, Társis Paiva Vieira, Carlos Eduardo Steiner
Juvenile idiopathic arthritis is a heterogeneous group of diseases characterized by arthritis with poorly known causes, including monogenic disorders and multifactorial etiology. 22q11.2 proximal deletion syndrome is a multisystemic disease with over 180 manifestations already described. In this report, the authors describe a patient presenting with a short stature, neurodevelopmental delay, and dysmorphisms, who had an episode of polyarticular arthritis at the age of three years and eight months, resulting in severe joint limitations, and was later diagnosed with 22q11.2 deletion syndrome. Investigation through Whole Genome Sequencing revealed that he had no pathogenic or likely-pathogenic variants in both alleles of the MIF gene or in genes associated with monogenic arthritis (LACC1, LPIN2, MAFB, NFIL3, NOD2, PRG4, PRF1, STX11, TNFAIP3, TRHR, UNC13DI). However, the patient presented 41 risk polymorphisms for juvenile idiopathic arthritis. Thus, in the present case, arthritis seems coincidental to 22q11.2 deletion syndrome, probably caused by a multifactorial etiology. The association of the MIF gene in individuals previously described with juvenile idiopathic arthritis and 22q11.2 deletion seems unlikely since it is located in the distal and less-frequently deleted region of 22q11.2 deletion syndrome.
Lorea CF, Oliveira BM, Fighera GZ, Milke JC , Broch MS, Viegas I, Melo BA, Dos Santos ML, Félix TM , RARAS Network Group
INTRODUCTION: Urea cycle disorders (UCDs) represent a group of rare diseases (RDs) characterized by impaired ammonia detoxification, leading to significant challenges in diagnosis and management. The Brazilian Rare Diseases Network (RARAS) aims to conduct an epidemiological surveillance of RD in 40 health centers from all regions of the country. OBJECTIVE: Present the epidemiological profile of UCDs cases in RARAS Network. MATERIALS AND METHODS: Data from patients with suspected and confirmed UCD diagnoses were extracted from RARAS REDCap database, from retrospective (2018-2019) and prospective (2022-2023) approaches. RESULTS: Fourteen individuals were identified with a UCD diagnosis of almost 20 thousand cases registered in the RARAS database. One case had suspected diagnosis (waiting for confirmatory tests), two were diagnosed through neonatal screening and 11 were diagnosed postnatally. The most prevalent disorders were Argininemia (n=4), Ornithine transcarbamylase deficiency (n=3), and Citrullinemia type I (n=3). Diagnoses were either biochemical (69.2%) or molecular (30.8%). Unified Health System (SUS) funded 69.2% of diagnoses. The interval until diagnosis ranged from 36 days to 27 years and 4 months (median of 3 years and 3 months). Also, 78.5% patients reported receiving treatment, of which 64.2% relied on private sources. The most consulted medical specialties were neurology or pediatric neurology (77.7%), followed by gastroenterology and hepatology (44.4%). The most common signs and symptoms, registered through the Human Phenotype Ontology, were hyperammonemia (n=5); jaundice; vomiting; seizure and intellectual disability (n=3). Nine patients (64.3%) registered hospitalizations (mean: 2.22 per patient), mainly due to UCD (ICD-10 E72.2). No death was reported in the studied period. CONCLUSION: Currently, in Brazil, the Neonatal Screening Program does not encompass tests for UCDs; nevertheless, a few states have implemented expanded neonatal screening. The two cases in this study were born in these locations. This study highlights the need to support UCD diagnosis through neonatal screening as early diagnosis is essential to therapeutic interventions and patient outcomes improvements. These results show the importance of public policies with SUS as the main funding source for diagnosis and management of UCDs patients.
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Ministério da Saúde do Brasil
Conselho Nacional de Desenvolvimento Científico e Tecnológico
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