Compromiso inmunológico en pacientes con síndrome de Down. Serie de casos / Immune compromise in patients with Down syndrome. A case series

El síndrome de Down, o trisomía 21, tiene una mortalidad mayor que la población general, debido principalmente a infecciones respiratorias. El objetivo de este trabajo es describir el compromiso inmunológico en una serie de casos de pacientes con síndrome de Down derivados a Inmunología por infecciones recurrentes o por hallazgo patológico de laboratorio, entre el 1 de junio de 2016 y el 31 de mayo de 2022. Se describe el compromiso de la inmunidad en 24 pacientes. Doce pacientes presentaron falla de respuesta a polisacáridos y recibieron quimioprofilaxis antibiótica y/o gammaglobulina sustitutiva. En 3 pacientes, se observó agammaglobulinemia con linfocitos B presentes y se indicó gammaglobulina sustitutiva. En 9 pacientes, se observó linfopenia T y en 1 paciente, compromiso inmune combinado.

Down syndrome, or trisomy 21, has a higher mortality than the general population, mainly due to respiratory tract infections. The objective of this study was to describe immune compromise in a series of cases of patients with Down syndrome referred to the Pediatric Immunology Section due to recurrent infections or pathological laboratory findings between 6/1/2016 and 5/31/2022. Here we describe immune compromise in 24 patients. Twelve patients failed to develop a polysaccharide response and received antibiotic chemoprophylaxis, or gamma globulin replacement therapy. Three patientsdeveloped agammaglobulinemia with presence of B cells and gamma globulin replacement therapy was indicated. Nine patients had T-cell lymphopenia and 1 patient, combined immune compromise.

Prenatal diagnosis of a fetus with mosaic trisomy 2 and uniparental disomy of chromosome 2 / 中华围产医学杂志

This paper presented the prenatal genetic analysis of a case of mosaic trisomy 2 combined with uniparental disomy 2. The pregnant women underwent non-invasive prenatal testing in Zhuhai Center for Maternal and Child Health Care on February 2019, which indicated an increased number of chromosome 2. Subsequently, amniocentesis was performed at 21 +2 weeks for prenatal diagnosis. No abnormalities were detected through the karyotype analysis of amniotic fluid cells. Chromosome microarray analysis of uncultured amniotic fluid cells revealed a duplication of 2.3 copies in chromosome 2 and 64.3 Mb regions of homozygosity in the 2q21.2q33.1 region. The comparison of single nucleotide information on fetus-parent chromosome 2 showed that the regions of homozygosity of the fetal 2q21.2q33.1 was paternal uniparental isodisomy (2), with the rest of chromosome 2 being paternal uniparental heterodisomy (2).Ultrasound results at 27 +6, 31 +6, and 34 +5 weeks of gestation showed continued exacerbation of fetal growth retardation with placental abnormalities and fetal blood flow spectrum abnormalities. Due to threatened preterm delivery at 35 +3 weeks, The pregnant woman chose to give up the fetus and delivered a stillbirth.

Enhancing understanding of SARS-CoV-2 infection among individuals with Down syndrome: An integrative review

ABSTRACT BACKGROUND: Down syndrome (DS) is a non-rare genetic condition that affects approximately 1 in every 800 live births worldwide. Further, it is associated with comorbidities, anatomical alterations of the respiratory tract, and immunological dysfunctions that make individuals more susceptible to respiratory infections. OBJECTIVE: To systematize the current scientific knowledge about the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection among individuals with DS. DESIGN AND SETTING: This integrative review was conducted at the Universidade Federal de São Carlos, São Paulo, Brazil. METHODS: This review was conducted in the following databases: the Virtual Health Library (Biblioteca Virtual em Saúde, BVS), PubMed, and Web of Science, using MeSH descriptors. The search included English or Portuguese studies published between January 1, 2020, and October 14, 2022. RESULTS: A total of 55 articles from 24 countries were selected, comprising 21 case-control or cohort studies, 23 case reports or series, and 11 narrative reviews or opinion studies. The articles were grouped into five categories: previous comorbidities, coronavirus disease 2019 (COVID-19) clinical features and evolution, cytokine storm and interleukins, living in institutions as a risk factor, and behavioral actions as a protective factor against SARS-CoV-2 infection. CONCLUSION: Individuals with DS are more susceptible to COVID-19 infection due to variables such as previous comorbidities, immunological factors, and their habitable environments. These aspects confer a higher risk of infection and an unfavorable clinical course. The precise pathways involved in the pathophysiology of COVID-19 in individuals with DS are not clear, thus requiring further studies. SYSTEMATIC REVIEW REGISTRATION: The Open Science Framework registered the research protocol (https://osf.io/jyb97/).

Patau and Edwards Syndromes in a University Hospital: beyond palliative care / Síndrome de Edwards e Patau em um hospital universitário: além do paliativo

ABSTRACT Objective: To describe the newborn population with Patau (T13) and Edwards Syndrome (T18) with congenital heart diseases that stayed in the Intensive Care Unit (ICU) of a quaternary care hospital complex, regarding surgical and non-surgical medical procedures, palliative care, and outcomes. Methods: Descriptive case series conducted from January/2014 to December/2018 through analysis of records of patients with positive karyotype for T13 or T18 who stayed in the ICU of a quaternary hospital. Descriptive statistics analysis was applied. Results: 33 records of eligible patients were identified: 27 with T18 (82%), and 6 T13 (18%); 64% female and 36% male. Eight were preterm infants with gestational age between 30-36 weeks (24%), and only 4 among the 33 infants had a birth weight >2500 g (12%). Four patients underwent heart surgery and one of them died. Intrahospital mortality was 83% for T13, and 59% for T18. The majority had other malformations and underwent other surgical procedures. Palliative care was offered to 54% of the patients. The median hospitalization time for T18 and T13 was 29 days (range: 2-304) and 25 days (13-58), respectively. Conclusions: Patients with T13 and T18 have high morbidity and mortality, and long hospital and ICU stays. Multicentric studies are needed to allow the analysis of important aspects for creating protocols that, seeking therapeutic proportionality, may bring better quality of life for patients and their families.

RESUMO Objetivo: Descrever a população de recém-nascidos com síndrome de Patau (T13) e Edwards (T18) portadores de cardiopatias congênitas, que permaneceram em Unidades de Terapia Intensiva (UTI) de um complexo hospitalar quaternário, com relação a conduta cirúrgica ou não, cuidados paliativos e seus desfechos. Métodos: Série de casos de pacientes internados entre janeiro de 2014 a dezembro de 2018, com análise dos prontuários de portadores de T13 ou T18 que permaneceram internados em UTI que recebem neonatos nesse hospital quaternário. Utilizou-se análise estatística descritiva. Resultados: Foram identificados 33 prontuários para análise — 27 T18 (81,8%) e seis T13 (18,2%); 64% do sexo feminino e 36% do sexo masculino. Oito foram prematuros, nascidos com 30 a 36 semanas (24,2%), e apenas quatro nasceram com mais de 2500 g (12,1%). Quatro pacientes foram submetidos a cirurgia cardíaca e um deles foi a óbito. A mortalidade intra-hospitalar foi de 83% para T13 e 59% para T18. A maioria apresentava outras malformações e foi submetida a outras cirurgias. Cuidados paliativos foram oferecidos a 54% dos pacientes. A mediana do tempo de hospitalização para T18 e T13 foi respectivamente de 29 dias (variação: 2-304) e 25 dias (13-58). Conclusões: Pacientes com T13 e T18 cursam com alta morbimortalidade e longa permanência hospitalar em UTI. São necessários estudos multicêntricos para melhor análise de aspectos importantes para a criação de protocolos que, buscando proporcionalidade terapêutica, tragam melhor qualidade de vida para os pacientes e suas famílias.

Holoprosencefalia alobar. reporte de caso / Holoprosencephaly alobar. Case Report

Desde el advenimiento de la ecografía obstétrica y estudios invasivos además genéticos fetales han ayudado en la detección antenatal de anormalidades congénitas siendo uno de los objetivos básicos de la vigilancia fetal anteparto. La combinación de ambas técnicas ofrece, hoy en día un abordaje completo en términos de diagnóstico prenatal. Se cree que muchos trastornos del desarrollo surgen de factores de riesgos genéticos y ambientales. Uno de estos es la holoprosencefalia, sirve como modelo para comprender diversas formas de etiología multifactorial. El análisis genómico, la epidemiología y estudios mecánicos de modelos animales han revelado que factores de riesgo interactúan para producir resultados de desarrollo adversos. La holoprosencefalia es consecuencia de factores genéticos y/o ambientales que interrumpen la especificación de la línea media del prosencéfalo en formación. Estas alteraciones dan lugar a una amplia gama de consecuencias fenotípicas para el cerebro y la cara del nuevo ser humano en formación. Son comunes en 1 de 250 fetos humanos, pero el 97% no sobrevive al nacimiento. La patogenia molecular precisa de la holoprosencefalia sigue siendo desconocida. Aquí, describimos nuestra comprensión de los principales factores impulsores que conducen a patologías de holoproscencefalia y elaboramos nuestro enfoque de genómica integrada multifactorial. Las tecnologías genómicas proporcionan una visión sin precedentes de la variación asociada a la enfermedad. A continuación, se describe un caso de diagnóstico prenatal de trisomía 13 y holoprosencefalia. En éste, se logró establecer un diagnóstico antenatal anatómico y genético preciso.

Since the advent of obstetric ultrasound and invasive studies, fetal genetics have helped in the antenatal detection of congenital abnormalities, being one of the basic objectives of antepartum fetal surveillance. The combination of both techniques currently offers a complete approach in terms of prenatal diagnosis. Many developmental disorders are thought to arise from genetic and environmental risk factors. One of these is holoprosencephaly, which serves as a model for understanding various forms of multifactorial etiology. Genomic analysis, epidemiology, and mechanistic studies of animal models have revealed that risk factors interact to produce adverse developmental outcomes. Holoprosencephaly results from genetic and/or environmental factors that disrupt the specification of the midline of the forming forebrain. These alterations result in a wide range of phenotypic consequences for the brain and face of the newly developing human being. They are common in 1 in 250 human fetuses, but 97% do not survive birth. The precise molecular pathogenesis of holoprosencephaly remains unknown. Here, we describe our understanding of the main drivers leading to holoproscencephaly pathologies and elaborate on our multifactorial integrated genomics approach. Genomic technologies provide unprecedented insight into disease-associated variation. A case of prenatal diagnosis of trisomy 13 and holoprosencephaly is described below. In this study, it was possible to establish an accurate anatomical and genetic antenatal diagnosis.

Prevalence and clinical characterization of oral clefts in patients with chromosome trisomy 18 / Prevalência e caracterização clínica de fendas orais em pacientes com trissomia do cromossomo 18

ABSTRACT Objective: To verify the prevalence and perform the clinical characterization of oral clefts in a sample of patients with trisomy of chromosome 18 in Southern Brazil. Methods: This was a retrospective cross-sectional study, performed in a reference clinical genetic service in Southern Brazil. The initial sample consisted of 77 patients diagnosed in the neonatal period with trisomy 18 treated at the Clinical Genetics Service of a referral hospital at Federal University of Health Sciences of Porto Alegre (UFCSPA). The patients' diagnosis was confirmed by karyotype and care was provided during their stay in the intensive care unit (ICU) of the hospital that is a reference in Southern Brazil for care for malformed patients. The period covered was from 1975 to 2020. Results: During the study period, 77 patients diagnosed with trisomy 18 were treated, most of them in the ICU. Of these, 13 individuals were excluded due to incomplete data. The final sample consisted of 64 patients with an average age of 2.4 years of life, ranging from one day to 16 years old, the majority of whom were female. Regarding face dysmorphisms identified in the sample, three (4,68%) patients had cleft lip and two (3,11%) had cleft lip and palate. Conclusions: This study contributed to the recognition of the characteristics and prevalence of oral clefts in individuals with trisomy 18 in a sample of patients from Southern Brazil. In addition, we described the clinical alterations found in patients with oral clefts, as well as other associated comorbidities, such as cardiac, neurological and pulmonary comorbidities, as well as cranial and facial dysmorphisms.

RESUMO Objetivo: Verificar a prevalência e realizar a caracterização clínica das fissuras orais em uma amostra de pacientes com trissomia do cromossomo 18 no sul do Brasil. Métodos: Este foi um estudo transversal retrospectivo, realizado em um serviço de referência em genética clínica do sul do Brasil. A amostra inicial foi composta de 77 pacientes com diagnóstico no período neonatal de trissomia 18 atendidos no Serviço de Genética Clínica da Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA). O diagnóstico dos pacientes foi confirmado por cariótipo e os atendimentos foram realizados durante sua internação na unidade de terapia intensiva (UTI) de hospital de referência no sul do Brasil para atendimento em pacientes malformados. O período abrangido foi de 1975 a 2020. Resultados: Durante o período do estudo foram atendidos, a maioria na UTI do hospital, 77 pacientes com diagnóstico de trissomia do cromossomo 18. Destes, 13 indivíduos foram excluídos por apresentarem dados incompletos. A amostra final foi de 64 pacientes, com idade média de 2,4 anos de vida, variando de um dia de vida a 16 anos, a maioria do sexo feminino. Com relação aos dismorfismos faciais identificados na amostra, três (4,68%) pacientes apresentavam fissuras labiais e dois (3,11%) fissuras labiopalatinas. Conclusões: Este estudo trouxe como contribuições o reconhecimento das características e a prevalência das fendas orais nos indivíduos com trissomia do cromossomo 18 em uma amostra de pacientes do sul do Brasil. Além disso, descrevemos as alterações clínicas encontradas em pacientes com fissuras orais, bem como outras comorbidades associadas, como comorbidades cardíacas, neurológicas e pulmonares, além de dismorfismos cranianos e faciais.

Trisomy 5:A Rare Isolated Finding in Pediatric B-lymphoblastic Leukemia

Background and Objectives: In acute leukemia, all diagnostic criteria and treatment protocols are based on cytogenetic and molecular geneticfindings. Despite recent advances in molecular biology, cytogenetic studies still play a pivotal role in the sub-classification of B-lymphoblastic leukemia (B-ALL). B-ALL is characterized by clonal cytogenetic abnormalities with numerical chromosomal aberrations being more common. An extra copy of chromosome 5 is common to see in cases with hyper diploidy. However, a gain of chromosome 5 as a sole anomaly is exceptionally rare in B-ALL. To date, trisomy 5 as a sole abnormality is reported in few cases only. We aimed to report the clinicopathologic profile of this rare finding to increase knowledge and highlight the disease course of these patients.Methods: We report a case of a 14-year boy presented with fever, lethargy and episodes of nasal bleeding for two weeks. He was admitted to the pediatric oncology unit at Indus hospital and health network, Karachi. Flowcytometry performed on peripheral blood using 8-color flowcytometry. Conventional karyotyping was performed by GTG banding. FISH panel was comprisedof dual color dual fusion probes for BCR::ABL1and ETV6::RUNX1whereas break apart probe for KMT2A (Metasystem, Germany).Digital image analysis for karyotyping and FISH was done on Leica Biosystems, Cytovision MB8.Results:Flowcytometry results were consistent with B-ALL. Cytogenetic analysis on his bone marrow aspirate revealed trisomy 5 as a sole abnormality with no evidence of any other clonal cytogenetic abnormality. FISH studies for BCR::ABL1, ETV6::RUNX1and KMT2Ashowed no evidence of gene rearrangements.Conclusion:Trisomy 5 is a very rare cytogenetic aberration. Only few cases reported in children. Inferior outcome is reported in both children and adults. The increasing number of reported cases raises the possibility of a distinct cytogenetic entity. Its prognostic and therapeutic implications are yet to be explored.

Cirugía plástica facial en niños con síndrome de Down / Facial Plastic Surgery in Children with Down Syndrome

Introducción: El síndrome de Down comprende diversos grados de retraso mental y un número de rasgos característicos en su facies. Debido a que estos pacientes presentan problemas en la vida social, laboral y educacional se han buscado soluciones que hagan de estos niños, individuos socialmente útiles. Este artículo muestra los resultados obtenidos en 22 pacientes con este síndrome que fueron tratados quirúrgicamente para corregir sus estigmas faciales. Objetivo: Demostrar los cambios funcionales y ventajas estéticas que se obtienen con la cirugía plástica facial en el paciente con síndrome de Down. Métodos: Se escogieron 22 pacientes con síndrome de Down de 3 a 14 años de edad en el período comprendido de 1986 a enero 2019. Se incluyeron los 15 primeros casos atendidos en el Hospital Pediátrico Docente William Soler en el Servicio de Cirugía Plástica y posteriormente en otros centros nacionales de salud. Los procederes quirúrgicos realizados para la corrección de los estigmas faciales fueron: glosectomía parcial, cantoplastia lateral, cantoplastia media y otoplastia. Resultados: Los cambios estéticos y funcionales fueron favorables, lo que mejoró la apariencia y eliminó los rasgos no atractivos. Se obtuvieron cambios positivos en el lenguaje y la respiración. La glosectomía y cantoplastia se realizó en el 100 por ciento de los casos. Conclusiones: Todos los pacientes operados atenuaron sus estigmas faciales, mientras que se reportaron beneficios respiratorios y mejoría en la esfera del lenguaje. El grado de satisfacción de los padres fue bueno(AU)

Introduction: Down syndrome comprises varying degrees of mental retardation and a number of characteristic facial features. Because these patients present problems in their social, occupational and educational life, solutions have been sought to make these children socially useful individuals. This work shows the results obtained in 22 patients with this syndrome who were surgically treated to correct their facial stigmata. Objective: To show the functional changes and aesthetic advantages obtained with facial plastic surgery in patients with Down syndrome. Methods: A number of 22 patients with Down syndrome aged 3 to 14 years were chosen, in the period from 1986 to January 2019. The first 15 cases attended in the plastic surgery service of Hospital Pediátrico Docente William Soler were included; later, others attended in other national health centers. The surgical procedures performed for the correction of facial stigmata were partial glossectomy, lateral canthoplasty, medial canthoplasty, and otoplasty. Results: Aesthetic and functional changes were favorable, improving appearance and eliminating unattractive features. Positive changes in speech and breathing were obtained. Glossectomy and otoplasty were performed in 100 percent of cases. Conclusions: All operated-on patients attenuated their facial stigmata, while respiratory benefits and speech improvement were reported. The degree of satisfaction of their parents was good(AU)

Prenatal Genetic Diagnosis and Origin Analysis of Rare Complete Translocation Trisomy 18 / 中山大学学报(医学科学版)

ObjectiveTo discuss the origin of rare abnormal karyotypes of fetuses with high risk of trisomy 18 revealed by non-invasive prenatal testing （NIPT） and its impact on fertility. MethodsThe cytogenetic and molecular genetic analyses were performed on the abnormal chromosomes of a prenatally diagnosed fetus with rare complete translocation trisomy 18. Using the keywords “translocation trisomy 18” or “trisomy 18 translocation” in both Chinese and English， we searched PubMed， CNKI， SinoMed， WanFang Data， CQ VIP and the Chinese Medicine database. The relevant case series were retrieved and critically appraised. ResultsG-banded karyotype analysis showed that the maternal karyotype was 46，XX，t（9；18）（q31.2；q23） and the fetal karyotype was 47， XN， t （9； 18） （q31.2；q23）mat， +18， which was a rare complete translocation type of trisomy 18. The SNP array revealed the fetus had increased copy number of chromosome 18 and two complete chromosome 18 inherited from the mother with balanced chromosomal translocation. Literature search found two children with complete translocation trisomy 18 reported abroad. Both of them had trisomy 18 phenotype and originated from the balanced translocation between parental chromosome 18 and other chromosomes. ConclusionNIPT gives an effective advance warning of trisomy 18. SNP array not only improves the detection rate of chromosomal abnormalities， but also helps identify the origin. The karyotype is still the gold standard for prenatal diagnosis.

Holoprosencephaly in Patau Syndrome / Holoprosencefalia na Síndrome de Patau

ABSTRACT Objective: To evaluate radiological (gestational and perinatal) and neonatal signs of patients with Patau syndrome and semilobar holoprosencephaly, as well as to report the association of both pathologies. Case description: This case report is about a female infant, born at term with trisomy of the chromosome 13 and semilobar holoprosencephaly, with thalamic fusion and a single cerebral ventricle, in addition to several other changes that worsened the patient's prognosis. Comments: Chromosome 13 trisomy is a genetic alteration that leads to the symptoms that determines Patau syndrome. In this syndrome, cardiovascular, urogenital, central nervous system, facial structure and intellectual impairment are common, in addition to problems in limb formation, such as decreased humerus and femur length, polydactyly, hypotelorism and low ear implantation. It is estimated, however, that holoprosencephaly is present in only 24 to 45% of the patients with trisomy 13.

RESUMO Objetivo: Avaliar sinais radiológicos (gestacionais e perinatais) e neonatais de paciente com síndrome de Patau e holoprosencefalia semilobar, assim como relatar a associação de ambas as patologias. Descrição do caso: Trata-se de um relato de recém-nascido do sexo feminino a termo, que apresentou trissomia do cromossomo 13 e holoprosencefalia semilobar, com fusão talâmica e ventrículo cerebral único, além de várias outras alterações que pioraram o prognóstico da paciente. Comentários: A trissomia do cromossomo 13 é um defeito genético que caracteriza um conjunto de sintomas que compõem a Síndrome de Patau. Nesta síndrome, é comum o acometimento cardiovascular, urogenital, do sistema nervoso central, da estrutura facial e da capacidade intelectual, além de falhas na formação dos membros, como diminuição no comprimento do úmero, fêmur, polidactilia, hipotelorismo e baixa implantação das orelhas. Estima-se, no entanto, que a holoprosencefalia apresente-se nesse grupo de malformações congênitas apenas em 24 a 45% dos casos.

Non-invasive prenatal testing for the diagnosis of congenital abnormalities: Insights from a large multicenter study in southern China

Although non-invasive prenatal testing (NIPT) is widely used to detect fetal abnormalities, the results of NIPT vary by population, and data for the screening efficiency of NIPT positive predictive value (PPV) from different populations is limited. Herein, we retrospectively analyzed the NIPT results in a large multicenter study involving 52,855 pregnant women. Depending on gestational age, amniotic fluid or umbilical cord blood was extracted for karyotype and/or chromosome microarray analysis (CMA) in NIPT-positive patients, and the PPV and follow-up data were evaluated to determine its clinical value. Among the 52,855 cases, 754 were NIPT-positive, with a positivity rate of 1.4%. Karyotype analysis and/or CMA confirmed 323 chromosomal abnormalities, with a PPV of 45.1%. PPV for trisomy 21 (T21), trisomy 18 (T18), trisomy 13 (T13), sex chromosomal aneuploidies (SCAs), and copy number variations (CNVs) were 78.9, 35.3, 22.2, 36.9, and 32.9%, respectively. The PPVs for T21, T18, and T13 increased with age, whereas the PPVs for SCAs and CNVs had little correlation with age. The PPV was significantly higher in patients with advanced age and abnormal ultrasound. The NIPT results are affected by population characteristics. NIPT had a high PPV for T21 and a low PPV for T13 and T18, and screening for SCAs and CNVs showed clinical significance in southern China.

Diagnóstico prenatal de enfermedad de canal atrio-ventricular, análisis epidemiológico y experiencia CERPO entre 2003 y 2021 / Prenatal diagnosis of atrio-ventricular canal disease, epidemiological analysis and CERPO experience between 2003 and 2021

Antecedentes: En Chile, la mitad de los casos de mortalidad perinatal son atribuibles a anomalías congénitas, y un tercio de estas corresponde a cardiopatías congénitas. Aproximadamente un 35% de estos últimos requerirán cirugía antes del año de vida, por lo que la pesquisa prenatal impacta profundamente en el pronóstico. Objetivo: Dar a conocer los resultados perinatales de pacientes con diagnóstico prenatal de canal atrio-ventricular controlados en el Centro de Referencia Perinatal Oriente (CERPO) entre los años 2003 y 2021, su asociación a otras anomalías, características demográficas y pronóstico a un año. Métodos: En este estudio se puede apreciar que tanto el pronóstico como el plan terapéutico posnatal dependerán de la presencia de otras alteraciones morfológicas y del estudio genético. De los factores estudiados, se puede concluir que tanto la presencia de anomalías cardiacas asociadas, como el grado de insuficiencia valvular y el tipo de canal no son predictores de la sobrevida perinatal. Conclusiones: Finalmente, en relación con la sobrevida posnatal, en este estudio, la sobrevida a un año de los recién nacidos vivos fue de un 52%, pero al desglosarlo en los niños con cariotipo euploide y trisomía 21, estos valores se tornan muy distintos, 44 y 81% respectivamente.

Background: In Chile, half of the perinatal mortality cases are attributable to congenital anomalies, and one third of these correspond to congenital heart disease. Approximately 35% of the later will require surgery before one year of life, so prenatal screening has a profound impact on the prognosis. Objective: To present the perinatal results of patients with a prenatal diagnosis of atrio-ventricular canal controlled at Centro de Referencia Perinatal Oriente CERPO) between 2003 and 2021, its association with other anomalies, demographic characteristics, and 1-year prognosis. Methods: In this study it can be seen that both the prognosis and the postnatal therapeutic plan will depend on the presence of other morphological alterations and the genetic study. From the factors studied, it can be concluded that the presence of associated cardiac anomalies, the degree of valvular insufficiency, and the type of canal are not predictors of perinatal survival. Conclusions: Finally, in relation to postnatal survival, in this study, the 1-year survival of live newborns was 52%, but when broken down into children with euploid karyotype and trisomy 21, these values become very different, 44 and 81% respectively.

Conducta médica frente al diagnóstico prenatal de trisomía 18: ¿se aproxima un cambio de paradigma?

El objetivo del trabajo es analizar dos conductas médicas opuestas en la vida prenatal de los niños con trisomía 18: el aborto y los cuidados paliativos perinatales. Se realizó una búsqueda bibliográfica en PubMed a partir de los términos "trisomy 18", "abortion" y "palliative care". Actualmente, están cambiando las conductas médicas dirigidas a los niños nacidos con trisomía 18, debido a que ya no se la considera una enfermedad incompatible con la vida. Este cambio de paradigma en la conducta médica posnatal debería reflejarse en la conducta prenatal, para ofrecer a los padres alternativas distintas al aborto. Los cuidados paliativos fetales y perinatales constituyen una respuesta ética válida para el tratamiento de niños con trisomía 18.

This article intends to analyze two opposing medical behaviors in the prenatal life of children with trisomy 18: abortion and perinatal palliative care. A literature search was carried out in PubMed using the terms "trisomy 18," "abortion," and "palliative care." Medical behaviors toward children born with trisomy 18 are changing because it is no longer considered a disease incompatible with life. This paradigm shift in postnatal medical conduct should be reflected in prenatal behavior to offer parents alternatives to abortion. Fetal and perinatal palliative care is a valid ethical response for treating children with trisomy 18.

O objetivo deste trabalho é analisar duas condutas médicas opostas na vida pré-natal das crianças com trissomia 18: o aborto e os cuidados paliativos perinatais. Foi realizada uma busca bibliográfica no PubMed a partir dos termos "trisomy 18", "abortion" e "palliative care". Atualmente, as condutas médicas para com as crianças nascidas com trissomia 18 estão mudando devido a não ser considerada mais como uma doença incompatível com a vida. Essa mudança de paradigma na conduta médica pós-natal deveria ser refletida na conduta pré-natal, para oferecer aos pais alternativas diferentes do aborto. Os cuidados paliativos fetais e perinatais constituem uma resposta ética válida para tratar crianças com trissomia 18.

Características ecográficas y anomalías congénitas en fetos con síndrome de Down / Ultrasound features and congenital anomalies in fetuses with Down syndrome

Resumen Objetivo: Describir y analizar los hallazgos ecográficos en 97 fetos portadores de síndrome de Down (SD) confirmado. Método: Se incluyeron todas las gestantes con diagnóstico prenatal de SD de nuestro centro, realizado por cariograma o reacción en cadena de la polimerasa cuantitativa fluorescente para aneuploidía. Se analizaron los informes genéticos y ecográficos, y se realizó un seguimiento posnatal. Resultados: De los 97 casos de SD, el 73% de los diagnósticos fueron entre las 11 y 14 semanas. El promedio de edad de las madres fue de 35,7 años. El 83% de los fetos con SD, evaluados a las 11-14 semanas, tuvieron una translucencia nucal ≥ 3,5 mm. Del total de los casos analizados, el 33% fueron portadores de una cardiopatía congénita, correspondiendo el 58% de estas a defectos mayores, principalmente anomalías del tabique auriculoventricular. Un 7,6% de los casos terminaron como mortinato, principalmente durante el tercer trimestre. Conclusiones: El ultrasonido es una herramienta muy sensible para la sospecha prenatal de SD y la detección de sus anomalías asociadas. Consideramos que la información aportada será útil para programar estrategias de pesquisa, organizar el control perinatal y precisar el consejo a los padres de fetos portadores de esta condición.

Abstract Objective: To describe and analyze the ultrasound findings in 97 fetuses with confirmed Down syndrome (DS). Method: All pregnant women with prenatal diagnosis of DS in our center, performed by karyotype or quantitative fluorescent polymerase chain reaction for aneuploidy, were included. Genetic and ultrasound reports were analyzed, as well as postnatal follow-up. Results: Of the 97 cases of DS, 73% of the diagnoses were between 11-14 weeks. The average age of the mothers was 35.7 years. 83% of our fetuses with DS, evaluated between 11-14 weeks, had a nuchal translucency ≥ 3.5 mm. Of the total of the fetuses analyzed, 33% were carriers of congenital heart disease, 58% of these correspond to a major defect, mainly anomalies of the atrioventricular septum. 7.6% of cases ended as stillbirth, mainly during the third trimester. Conclusions: Ultrasound is a very sensitive tool for prenatal suspicion of DS and the detection of its associated abnormalities. We believe that the information provided will be useful to program screening strategies, organize perinatal control and to counselling parents of fetuses carrying this condition.

Caracterización de los recién nacidos con síndrome de down según condiciones de salud, demográficas y sociales en Medellín del periodo 2015 a 2019 / Characterization of newborns with Down Syndrome according to health, demographic and social conditions in Medellín from the period 2015 to 2019

Resumen La adaptación de una atención especializada para recién nacidos con Síndrome de Down (SD) requiere el reconocimiento de sus características a nivel local. Objetivo: caracterizar los recién nacidos diagnosticados con SD y sus madres en unidades de atención materno infantil de la ciudad de Medellín. Adicionalmente, se exploraron factores asociados al diagnóstico oportuno antenatal. Método: estudio observacional descriptivo de tipo transversal con intención analítica basado en registros médicos de recién nacidos diagnosticados con SD en siete instituciones de Medellín, Antioquia entre enero de 2015 y diciembre de 2019 teniendo en cuenta variables tanto maternas como neonatales. Se realizó un análisis univariado mediante frecuencias absolutas y relativas, luego se realizó un análisis bivariado teniendo en cuenta los desenlaces neonatales según el acceso al control prenatal y el momento en el cual se realizó el diagnóstico (prenatal o neonatal) y finalmente se realizó un análisis multivariado para diagnóstico neonatal tardío. Resultados: el 50,2% de las madres al momento del parto tenía 35 años o menos, de estas el 59,9% pertenecía al régimen contributivo y el 83,4% realizó 4 controles prenatales (CPN) o más, a pesar de esto, se encontró que sólo el 33,7% tenían diagnóstico prenatal de SD. La mayoría (91,4%) de los neonatos tuvo diagnóstico de cardiopatía congénita y la estancia hospitalaria prolongada estuvo en relación a morbilidad relacionadas. Conclusión: el SD es una de las cromosomopatías más común en nuestro medio, la cual se puede diagnósticar de forma temprana. Sin embargo en nuestro estudio se pudo evidenciar que pese a la alta cobertura de CPN la frecuencia del diagnóstico antenatal es menor, lo cual requiere que estos controles sean realizados por personal médico entrenado en pacientes con este tipo de patología. Esto finalmente se va a ver reflejado en una mejor aceptación por parte de la familia hacia la llegada de un hijo con esta condición y por supuesto, mejor acceso a servicios de salud especializados.

Abstract The adaptation of specialized care for newborns with Down syndrome (DS) requires recognition of its characteristics at the local level. Goal: to characterize newborns diagnosed with DS and their mothers in maternal and child care units in the city of Medellín. Also, explore the factors associated with timely prenatal diagnosis. Methods: observational, cross-sectional study, based on medical records of newborns diagnosed with DS in seven institutions in Medellín, Antioquia between January 2015 and December 2019, taking into account both maternal and neonatal variables. Initially, a univariate analysis was performed using absolute and relative frequencies, then a bivariate analysis was performed taking into account neonatal outcomes according to access to prenatal care and the time at which the diagnosis was made (prenatal or neonatal), and finally a multivariate analysis for late neonatal diagnosis. Results: 50.2% of the mothers at the time of delivery were 35 years old or younger, of these 59.9% belonged to the contributory regime and 83.4% had 4 prenatal check-ups or more, despite this, it was found that only 33.7% had a prenatal diagnosis of DS. The majority (91.4%) of the neonates had a diagnosis of congenital heart disease and the prolonged hospital stay was related to related morbidity. Conclusion: DS is one of the most common chromosomal abnormalities in our environment, which can be diagnosed early. However, in our study it was possible to show that despite the high coverage of prenatal controls, the frequency of antenatal diagnosis is lower, which requires that these controls be carried out by medical personnel trained in patients with this type of pathology. This will finally be reflected in a better acceptance by the family towards the arrival of a child with this condition and, of course, better access to specialized health services.

Chronic lymphocytic leukemia with t(14;18)(q32;q21): report of 3 cases and review of literature / 白血病·淋巴瘤

Objective:To improve the understanding of chronic lymphoblastic leukemia (CLL) with t(14;18)(q32;q21).Methods:The clinical data of 3 cases diagnosed as CLL with t(14;18)(q32;q21) in the Tianjin KingMed Medical Laboratory from January 2020 to January 2021 were retrospectively analyzed. The clinicopathological data, morphological examination, immunophenotype, cytogenetics and somatic mutation of immunoglobulin heavy chain variable region genes of patients were comprehensively analyzed, and the literature was reviewed.Results:All the 3 patients showed lymphatic proliferative diseases, and their morphological characteristics and immunophenotype were typical characteristics of CLL.Conclusions:The diagnosis of CLL is mainly based on the typical morphology and immunophenotype of tumor cells. The presence of t(14;18) should not be used to exclude the diagnosis of CLL.

Genetic testing and analysis of 2 cases of trisomy 11 mosaicism / 南方医科大学学报

Trisomy 11 mosaicism is clinically rare, for which making diagnostic and treatment decisions can be challenging. In this study, we used noninvasive prenatal testing, chromosome karyotype analysis, chromosome microarray analysis, copy number variation sequencing and fluorescence in situ hybridization for detecting trisomy 11 mosaicism in two cases and provided them with genetic counseling. In one of the cases, the fetus with confined placental mosaicism trisomy 11 presented with severe growth restriction and a placental mosaic level of 44%, and pregnancy was terminated at 25+3 weeks of gestation. In the other case with true low-level fetal mosaicism of trisomy 11, the pregnancy continued after exclusion of the possibility of uniparental disomy and structural abnormalities and careful prenatal counseling. The newborn was followed up for more than one year, and no abnormality was found. Noninvasive prenatal testing is capable of detecting chromosomal mosaicism but may cause missed diagnosis of true fetal mosaicism. For cases with positive noninvasive prenatal testing but a normal karyotype of the fetus, care should be taken in prenatal counseling and pregnancy management.

Genetic analysis and prenatal diagnosis of intellectual disability caused by Xq25 microduplication in a pedigree / 中华围产医学杂志

Objective:To analyze the clinical and genetic characteristics of a 27-year-old male patient with intellectual disability and his pedigree to provide a reference for genetic counseling and prenatal diagnosis.Methods:G-banding and array comparative genomic hybridization (aCGH) were performed to analyze the karyotypes and genomic copy number variations of the proband (Ⅲ-1) and his family members. Based on the results, prenatal diagnosis was performed for one pregnant woman (Ⅲ-2) in the pedigree who is the sister of the proband.Results:All karyotyping were normal in the family members, while aCGH results showed a 1 533 kb microduplication in the Xq25 region of the proband, his mother (Ⅱ-3), his uncle (Ⅱ-2), and his sister (Ⅲ-2), which was confirmed to be pathogenic. The proband and his uncle presented with intellectual disability, bradylalia, and facial dysmorphism. In contrast, his mother and sister showed normal phenotypes. His sister's fetal karyotype and aCGH results were normal, and the pregnancy continued. A male baby (Ⅳ-1) was delivered vaginally at term and showed no physical or intellectual abnormalities during a 46-month follow-up.Conclusions:Xq25 microduplication might be the cause of intellectual disability in the proband. STAG2 is probably the essential gene in Xq25 region.

Falsos positivos del cribado de trisomía 21 y 18 del primer trimestre y complicaciones obstétricas / Adverse outcomes in pregnancies with false positive trisomy 21 and 18 screening results

OBJETIVO: Analizar si los casos positivos de cribado combinado de trisomía 21 (t21) o trisomía 18 (t18) en ausencia de aneuploidía (falsos positivos- FP) se relacionan con complicaciones de la gestación, ajustando por factores demográficos y clínicos de riesgo. MATERIAL Y MÉTODOS: Estudio retrospectivo de casos y controles anidado en una cohorte de pacientes que acudieron para cribado del primer trimestre. Los casos fueron las pacientes con FP de riesgo combinado de t21 superior a 1/270 o riesgo de t18 superior a 1/100. Se consideraron complicaciones de la gestación: óbito fetal, parto prematuro menor de 34 semanas o prematuro menor de 37 semanas, preeclampsia, retrasos de crecimiento, pequeño para la edad gestacional (CIR, PEG) y diabetes gestacional (DG). Se ajustó por obesidad, edad, paridad, tabaquismo, y técnicas de reproducción asistida. RESULTADO: Se obtuvieron 204 casos de FP, 149 FP para trisomía 21, 41 para trisomía 18, y 14 FP para ambos riesgos. Se encontró asociación estadísticamente significativa de FP t21 con óbito fetal (OR=3,5; ic95% 1,4-8,7; p=0,01), parto prematuro menor de 37 semanas (OR=2,2; IC95% 1,4-3,4; p=0,001), preeclampsia (OR =2,6; IC95% 1,17-6,1; p=0,02), PEG (OR =2,2; IC95% 1,2-4,1; p=0,02), CIR (OR=2,8; IC95% 1,6-5,1; p=0,001), y DG (OR=2,1; IC95% 1,2-3,7; p=0,01). Los FP t18 se asociaron con óbito (OR=8,9; IC95% 2,9-27; p=0,002). CONCLUSIÓN: Los FP del cribado del primer trimestre, para trisomía 21 y trisomía 18, se asocian con resultados obstétricos adversos.

We have studied whether positive cases of combined trisomy 21 (t21) or 18 (t18) screening in the absence of aneuploidy (false positives -FP-) are related to pregnancy complications adjusting for demographic and clinical risk factors. METHODS: Retrospective case-control study nested in a cohort of patients who came for first trimester aneuploidy screening. The cases were patients with FP combined risk of t21 (greater than 1/270) or t18 risk (greater than 1/100). The control group was a sample of patients with low-risk screening. We considered pregnancy complications: stillbirth, premature delivery before 34 and 37 weeks, preeclampsia, growth retardation, small for gestational age (FGR, SGA), and gestational diabetes (GD). Or were adjusted for obesity, age, parity, smoking, and assisted reproduction techniques. RESULTS: 204 cases of FP were obtained, 149 FP for trisomy 21, 41 for trisomy 18, and 14 FP for both risks. A statistically significant association between t21 FP was found with stillbirth (OR = 3.5; 95% CI 1.4-8.7; p = 0.01), preterm delivery less than 37 weeks (OR = 2.2; 95% CI 1.4-3.4; p = 0.001), preeclampsia (OR = 2.6; 95% CI 1.17-6.1; p = 0.02), SGA (OR = 2.2; 95% CI 1, 2-4.1; p = 0.02), FGR (OR = 2.8; 95% CI 1.6-5.1; p = 0.001), and GD (OR = 2.1; 95% CI 1.2 −3.7; p = 0.01). FP t18s were associated with fetal loss (OR= 8.9 (95% CI 2.9-27) p = 0.002. CONCLUSION: FP from first trimester screening for t21 and t18 are associated with adverse obstetric outcomes.

Cytogenetic and molecular genetic analysis of three fetuses at high risk of trisomy-16 detected by cell-free fetal DNA testing / 中华围产医学杂志

Objective:To investigate the power and prenatal diagnosis strategies of cell-free fetal DNA (cffDNA) testing for chromosomal aneuploidy screening apart from trisomy-13/18/21.Methods:This study collected the clinical data of three cases at high risk of trisomy-16 indicated by cffDNA testing in Hunan Provincial Maternal and Child Health Care Hospital from March 2019 to March 2020. Results of the conventional G-banding karyotype analysis of amniotic fluid, single nucleotide polymorphism array (SNP-array) and low-coverage massively parallel copy number variation sequencing (CNV-seq) of placenta/fetal skin samples were analyzed.Results:(1) cffDNA testing results suggested that case 1-3 were at high risk of trisomy-16 and the Z values of chromosome 16 were 20.57, 24.88 and 17.87, respectively. (2) Karyotype analysis of amniotic fluid samples did not identify any abnormalities in Case 1 and 2, while SNP-array revealed a 19.2 Mb and 23.0 Mb heterozygous deletion at 16p13.3p12.3 and 16q22.1q24.3 in Case 1, and a 16.0 Mb loss of heterozygosity at 16q22.3q24.3 in Case 2. Case 3 had a mosaicism karyotype of 47,XY,+16[3]/46,XY[97] and SNP-array analysis showed no heterozygous deletion greater than 5 Mb or copy number variation. (3) Ultrasonography indicated fetal growth restriction in Case 1 and 2 and fetal death in Case 3. All three pregnancies were terminated. CNV-seq analysis of placental tissue in the center of both fetal and maternal side revealed mosaic trisomy 16, with the copy numbers of chromosome 16 of 2.56/2.70, 2.73/2.82, 2.80/2.81, respectively. However, no copy number variation was detected in Case 1 or 2 by CNV-seq analysis of fetal skin tissues. Conclusions:cffDNA testing has a certain power in detecting trisomy-16 apart from trisomy-13/18/21. For high-risk cases of trisomy-16 indicated by cffDNA testing, SNP-array analysis combined with karyotype analysis is suggested to rule out low-level mosaicism and loss of heterozygosity.