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This study reports three patients with Cat-eye Syndrome (CES), two of which present a previous clinical diagnosis of Craniofacial microsomia (CFM). Chromosomal microarray analysis (CMA) revealed a tetrasomy of 1,7 Mb at the 22q11.2q11.21 region, which is the typical region triplicated in the CES, in all patients. The most frequent craniofacial features found in individuals with CFM and CES are preauricular tags and/or pits and mandibular hypoplasia. We reinforce that the candidate genes for CFM features, particularly ear malformation, preauricular tags/pits, and facial asymmetry, can be in the proximal region of the 22q11.2 region.
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Abstract Objective This article presents a clinical and cytogenomic approach that focuses on the diagnosis of syndromic oral clefts (OCs). Methods The inclusion criteria were individuals with OC presenting four or more minor signs and no major defects (non-syndromic oral clefts [NSOCs]) as well as individuals with OC presenting at least another major defect, regardless of the number of minor signs (syndromic oral clefts [SOCs]). The exclusion criteria included NSOC with less than four minor signs, SOC with known etiology, as well as atypical oral clefts. Results Of 1647 individuals with OC recorded in the Brazilian Database of Craniofacial Anomalies, 100 individuals were selected for chromosome microarray analysis (CMA). Among these, 44 individuals were clinically classified as NSOC and 56 as SOC. CMA was performed for both groups, and abnormal CMA was identified in 9%, all previously classified as SCO. The clinical and CMA data analyses showed a significant predominance of abnormal CMA in individuals classified as SOC (p = 0.0044); prematurity, weight, length, and head circumference at birth were significantly lower in the group with abnormal CMA. Besides, minor signs were significantly higher in this group (p = 0.0090). Conclusion The rigorous selection of cases indicates that the significant variables could help in early recognition of SOC. This study reinforces the importance of applying the CMA technique to establish the diagnosis of SOC. This is an important and universal issue in clinical practice for intervention, care, and genetic counseling.
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Humanos , Fenda Labial/genética , Fissura Palatina/genética , Brasil , Aberrações Cromossômicas , GenômicaRESUMO
This study aims to discuss diagnostic criteria and severity assessment for craniofacial microsomia (CFM). A series of 61 patients with diverse CFM phenotypes had their clinical data collected by experienced dysmorphologists using a single protocol. Genetic abnormalities were searched through karyotype and chromosomal microarray analysis. Sex ratio, prenatal risk factors, and recurrence rate corroborated the literature. Despite the wide variability of clinical findings, ear disruption was universal. Eight patients were assigned as syndromic, four of whom had demonstrable genetic alterations. The majority of patients (67.2%) fulfilled four known diagnostic criteria, while 9.8% fulfilled one of them. Data strengthened disruptions of the ear and deafness as a semiotically valuable sign in CFM. Facial impairment should consider asymmetry as a mild expression of microsomia. Spinal and cardiac anomalies, microcephaly, and developmental delay were prevalent among extra craniofacial features and should be screened before planning treatment and follow up. The severity index was able to recognize the less and the most affected patients. However, it was not useful to support therapeutic decisions and prognosis in the clinical scenario due to syndromic and non-syndromic phenotypes overlapping. These issues make contemporary the debate on diagnostic methods and disease severity assessment for CFM. They also impact care and etiopathogenetic studies.
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Síndrome de Goldenhar , Cardiopatias Congênitas , Microcefalia , Face , Síndrome de Goldenhar/diagnóstico , Síndrome de Goldenhar/genética , Humanos , Coluna VertebralRESUMO
Several studies have shown that the Brazilian Northeast is a region with high rates of inbreeding as well as a high incidence of autosomal recessive diseases. The elaboration of public health policies focused on the epidemiological surveillance of congenital anomalies and rare genetic diseases in this region is urgently needed. However, the vast territory, socio-demographic heterogeneity, economic difficulties and low number of professionals with expertise in medical genetics make strategic planning a challenging task. Surnames can be compared to a genetic system with multiple neutral alleles and allow some approximation of population structure. Here, surname analysis of more than 37 million people was combined with health and socio-demographic indicators covering all 1794 municipalities of the nine states of the region. The data distribution showed a heterogeneous spatial pattern (Global Moran Index, GMI = 0.58; p < 0.001), with higher isonymy rates in the east of the region and the highest rates in the Quilombo dos Palmares region - the largest conglomerate of escaped slaves in Latin America. A positive correlation was found between the isonymy index and the frequency of live births with congenital anomalies (r = 0.268; p < 0.001), and the two indicators were spatially correlated (GMI = 0.50; p < 0.001). With this approach, quantitative information on the genetic structure of the Brazilian Northeast population was obtained, which may represent an economical and useful tool for decision-making in the medical field.
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Genética Médica/estatística & dados numéricos , Genética Populacional/estatística & dados numéricos , Nomes , Adolescente , Adulto , Idoso , Brasil , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Dinâmica Populacional , Adulto JovemRESUMO
OBJECTIVE: This article presents a clinical and cytogenomic approach that focuses on the diagnosis of syndromic oral clefts (OCs). METHODS: The inclusion criteria were individuals with OC presenting four or more minor signs and no major defects (non-syndromic oral clefts [NSOCs]) as well as individuals with OC presenting at least another major defect, regardless of the number of minor signs (syndromic oral clefts [SOCs]). The exclusion criteria included NSOC with less than four minor signs, SOC with known etiology, as well as atypical oral clefts. RESULTS: Of 1647 individuals with OC recorded in the Brazilian Database of Craniofacial Anomalies, 100 individuals were selected for chromosome microarray analysis (CMA). Among these, 44 individuals were clinically classified as NSOC and 56 as SOC. CMA was performed for both groups, and abnormal CMA was identified in 9%, all previously classified as SCO. The clinical and CMA data analyses showed a significant predominance of abnormal CMA in individuals classified as SOC (pâ¯=â¯0.0044); prematurity, weight, length, and head circumference at birth were significantly lower in the group with abnormal CMA. Besides, minor signs were significantly higher in this group (pâ¯=â¯0.0090). CONCLUSION: The rigorous selection of cases indicates that the significant variables could help in early recognition of SOC. This study reinforces the importance of applying the CMA technique to establish the diagnosis of SOC. This is an important and universal issue in clinical practice for intervention, care, and genetic counseling.
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Fenda Labial , Fissura Palatina , Brasil , Aberrações Cromossômicas , Fenda Labial/genética , Fissura Palatina/genética , Genômica , Humanos , Recém-NascidoRESUMO
The aim of this study was to perform 22q11.2 deletion screening and chromosomal microarray analysis (CMA) in individuals clinically diagnosed with craniofacial microsomia (CFM) and review previously published cases of CFM with genomic imbalances. It included 54 individuals who were evaluated by a clinical geneticist. Copy number variants (CNVs) in the 22q11.2 region were investigated by multiplex ligation-dependent probe amplification (MLPA) for all individuals. The CMA was performed only for individuals with additional major features. MLPA revealed pathogenic CNVs at the 22q11 region in 3/54 (5.6%) individuals. CMA revealed pathogenic CNVs in 4/17 (23.5%) individuals, including the three CNVs at the 22q11 region also detected by MLPA, and CNVs classified as variants of unknown significance (VOUS) in 4/17 (23.5%) individuals. Pathogenic alterations were found at the 2p12, 5p15, 13q13, and 22q11 regions. VOUS were found at 3q29, 5q22.2, 5q22.1, and 9p22 regions. All individuals with pathogenic alterations presented additional major features, including congenital heart disease (CHD). The literature review revealed pathogenic CNVs in 17/193 (8.8%) individuals and most of them also presented additional major features, such as CHD, renal anomalies, or developmental delay. In conclusion, CNVs should be investigated in patients with CFM and additional major features.
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Síndrome de Goldenhar , Cardiopatias Congênitas , Variações do Número de Cópias de DNA , Genômica , Síndrome de Goldenhar/genética , Humanos , Análise em MicrossériesRESUMO
BACKGROUND: The World Health Organization has recognized the relevance of databases on craniofacial anomalies since . To date, there is no universal standard instrument/database focused on risk factors, clinical and genetic data collection, and follow-up that enables comparison between different populations and genotype-phenotype correlation. Although studies have shown that specific genes would impact outcomes, knowledge is not sufficient to subsidize cost-effectiveness strategies for diagnosis, surgical decision, and a multi-professional approach toward personalized medicine. METHODS: Based on a clinical genetic approach, a Web-based application named CranFlow-Craniofacial Anomalies: Registration, Flow, and Management has been developed. It prospectively collects clinical and genetic information for the Brazilian Database on Craniofacial Anomalies (syndromic and nonsyndromic orofacial cleft, 22q11.2 deletion syndrome, and other craniofacial related disorders). A comprehensive list of CranFlow's features is provided. RESULTS: We present preliminary results on 1546 cases already recorded and followed, which allows recognizing 10% of diagnosis changes. CONCLUSION: The identification of risk factors, consistent genetic approach associated with clinical data and follow-up result in valuable information to develop and improve personalized treatment and studies on genotype-phenotype correlation. Adoption of CranFlow in different clinical services may support comparison between populations. This application has the potential to contribute to improvements in healthcare, quality of services, clinical and surgical outcomes, and the standard of living of individuals with craniofacial anomalies. Birth Defects Research 110:72-80, 2018. © 2017 Wiley Periodicals, Inc.
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Anormalidades Craniofaciais/classificação , Brasil/epidemiologia , Bases de Dados Factuais , Estudos de Associação Genética , Humanos , Sistema de Registros , SoftwareRESUMO
This article reports a patient with a de novo â¼ 9.32 Mb duplication at 16p13.3 and a â¼ 71 Kb deletion at 22q13.33. The patient was followed from 1 month old to 3 years and 8 months of age and presented typical features of the 16p13.3 duplication syndrome. In addition, the patient presents a portal cavernoma, an alteration rarely reported in this condition. Renal agenesis was detected as additional developmental defect. After genomic array and FISH analysis, the karyotype was 46,XX,ins(22;16)(q13;p13.2p13.3). ish ins(22;16)(RP11-35P16+, RP11-27M24+). arr16p13.2p13.3(85,880-9,413,353)×3 dn arr22q13.33 (51,140,789-51,197,838)×1 dn. The authors provide a comprehensive review of the literature. This approach shed light on the genotype-phenotype correlation.
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Deleção Cromossômica , Duplicação Cromossômica , Cromossomos Humanos Par 16 , Cromossomos Humanos Par 22 , Estudos de Associação Genética , Bandeamento Cromossômico , Hibridização Genômica Comparativa , Fácies , Feminino , Genótipo , Humanos , Hibridização in Situ Fluorescente , Recém-Nascido , FenótipoRESUMO
ABSTRACT OBJECTIVES: To describe prevalence of associated defects and clinical-genetic characteristics of patients with typical orofacial clefts seen at a reference genetic service. METHODS: Descriptive study conducted between September of 2009 and July of 2014. Two experienced dysmorphologists personally collected and coded clinical data using a validated, standard multicenter protocol. Syndromic cases were defined by the presence of four or more minor defects, one or more major defects, or recognition of a specific syndrome. Fisher's exact and Kruskal-Wallis tests were used for statistics. RESULTS: Among 141 subjects, associated defects were found in 133 (93%), and 84 (59.5%) were assigned as syndromic. Cleft palate was statistically associated with a greater number of minor defects (p < 0.0012) and syndromic assignment (p < 0.001). Syndromic group was associated with low birth weight (p < 0.04) and less access to surgical treatment (p < 0.002). There was no statistical difference between syndromic and non-syndromic groups regarding gender (p < 0.55), maternal age of 35 years and above (p < 0.50), alcohol (p < 0.50) and tobacco consumption (p < 0.11), consanguinity (p < 0.59), recurrence (p < 0.08), average number of pregnancies (p < 0.32), and offspring (p < 0.35). CONCLUSIONS: There is a lack of information on syndromic clefts. The classification system for phenotype assignment adopted in this study has facilitated recognition of high prevalence of associated defects and syndromic cases. This system may be a useful strategy to gather homogeneous samples, to elect appropriate technologies for etiologic and genotype-phenotype approaches, and to assist with multiprofessional care and genetic counseling.
RESUMO OBJETIVOS: Descrever a prevalência de defeitos associados e as características genético-clínicas de pacientes com fendas orofaciais típicas (FOT) em um serviço de referência em genética. MÉTODOS: Estudo descritivo feito entre setembro/2009 e julho/2014. Os dados foram colhidos e codificados por dois observadores clínicos com experiência em dismorfologia, com protocolo validado em estudo multicêntrico. Presença de quatro ou mais defeitos minor, um ou mais defeitos major e diagnóstico de síndrome reconhecida foram critérios usados para classificar o caso como sindrômico. Usou-se teste exato de Fisher para análise de variáveis categóricas e o de Kruskal-Wallis para igualdade de médias. RESULTADOS: Entre 141 sujeitos, 133 (93%) apresentavam ao menos um defeito minor ou major associado, 84 (59,5%) classificados como sindrômicos. As fendas de palato estiveram associadas com maior número de defeitos minor (p < 0,0012) e com a classificação sindrômica (p < 0,01). O grupo sindrômico apresentou maior taxa de baixo peso (p < 0,04) e menor acesso a tratamento cirúrgico (p < 0,02). Não houve diferenças entre os grupos quanto ao gênero (p < 0,55), idade materna ≥ 35 anos (p < 0,50), ingestão de álcool (p < 0,50) e tabagismo (p < 0,11), consanguinidade (p < 0,59), recorrência familial (p < 0,08) e média de gestações (p < 0,32) e de filhos nascidos vivos (p < 0,35). CONCLUSÕES: Existe escassez de informações sobre fendas sindrômicas. O método de classificação fenotípica usado possibilitou a identificação de alta prevalência de defeitos associados e de casos sindrômicos. Esse método seria uma opção para homogeneizar amostras, determinar tecnologias com vistas à investigação etiológica e estudos de correlação genótipo-fenótipo, além de colaborar para intervenção multiprofissional e aconselhamento genético.
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Adolescente , Adulto , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Adulto Jovem , Fenda Labial/complicações , Fissura Palatina/complicações , Peso ao Nascer , Brasil/epidemiologia , Estudos Transversais , Fenda Labial/diagnóstico , Fenda Labial/epidemiologia , Fissura Palatina/diagnóstico , Fissura Palatina/epidemiologia , Anormalidades Congênitas/diagnóstico , Anormalidades Congênitas/epidemiologia , Idade Materna , Fenótipo , Prevalência , SíndromeRESUMO
OBJECTIVES: To describe prevalence of associated defects and clinical-genetic characteristics of patients with typical orofacial clefts seen at a reference genetic service. METHODS: Descriptive study conducted between September of 2009 and July of 2014. Two experienced dysmorphologists personally collected and coded clinical data using a validated, standard multicenter protocol. Syndromic cases were defined by the presence of four or more minor defects, one or more major defects, or recognition of a specific syndrome. Fisher's exact and Kruskal-Wallis tests were used for statistics. RESULTS: Among 141 subjects, associated defects were found in 133 (93%), and 84 (59.5%) were assigned as syndromic. Cleft palate was statistically associated with a greater number of minor defects (p<0.0012) and syndromic assignment (p<0.001). Syndromic group was associated with low birth weight (p<0.04) and less access to surgical treatment (p<0.002). There was no statistical difference between syndromic and non-syndromic groups regarding gender (p<0.55), maternal age of 35 years and above (p<0.50), alcohol (p<0.50) and tobacco consumption (p<0.11), consanguinity (p<0.59), recurrence (p<0.08), average number of pregnancies (p<0.32), and offspring (p<0.35). CONCLUSIONS: There is a lack of information on syndromic clefts. The classification system for phenotype assignment adopted in this study has facilitated recognition of high prevalence of associated defects and syndromic cases. This system may be a useful strategy to gather homogeneous samples, to elect appropriate technologies for etiologic and genotype-phenotype approaches, and to assist with multiprofessional care and genetic counseling.