Impact of ERT and follow-up of 17 patients from the same family with a mild form of MPS II

Abstract Background: Mucopolysaccharidosis type II, also known as Hunter syndrome, is a rare X-linked recessive disorder caused by deficiency of the lysosomal enzyme Iduronate-2- Sulfatase (IDS), leading to progressive accumulation of Glycosaminoglycans (GAGs) in several organs. Over the years, Enzyme Replacement Therapy (ERT) has provided significant benefits for patients, retarding the natural progression of the disease. Results: The authors evaluated 17 patients from the same family with a mild form of MPS type II; the proband had developed acute decompensated heart failure refractory to clinical measurements at 23 years and needed a rather urgent heart transplant; however, he died from surgical complications shortly after the procedure. Nevertheless, subsequent to his tragic death, 16 affected male relatives were detected after biochemical tests identifying the low or absent activity of the IDS enzyme and confirmed by molecular analysis of the IDS gene. Following diagnosis, different options of treatment were chosen: 6 patients started ERT with Elaprase® (Idursulfase) soon after, while the other 10 remained without ERT. Eventually, 4 patients in the latter group began ERT with Hunterase® (Idursulfase Beta). None presented adverse effects to either form of the enzyme. Among the 6 individuals without any ERT, two died of natural causes, after reaching 70 years. Despite the variable phenotype within the same family (mainly heart dysfunctions and carpal tunnel syndrome), all 14 remaining patients were alive with an independent lifestyle. Conclusion: Here, the authors report the variable progress of the disease with and without ERT in a large Brazilian family with a slowly progressive form of MPS II, harboring the same missense variant in the IDS gene.

Nationwide questionnaire data of 229 Williams-Beuren syndrome patients using WhatsApp tool / Resultados de um questionário nacional de 229 pacientes com síndrome de Williams-Beuren obtidos por WhatsApp

ABSTRACT Background: Williams-Beuren syndrome is a multisystemic disorder caused by a microdeletion of the 7q11.23 region. Although familial cases with autosomal dominant inheritance have been reported, the vast majority are sporadic. Objective: To investigate the main complaints and clinical findings of patients with Williams-Beuren syndrome. Methods: A total of 757 parents of patients registered in the Brazilian Association of Williams-Beuren Syndrome (ABSW) received a questionnaire via WhatsApp from March to July 2017. Results: In total, 229 parents answered the survey. Age of diagnosis ranged from 2 days to 34 years (median: 3 years). The main clinical findings reported by the parents were abdominal colic (83.3%), failure to thrive (71.5%), feeding difficulty in the first year (68.9%), otitis (56.6%), urinary tract infections (31.9%), precocious puberty (27.1%) and scoliosis (15.9%). Cardiac defects were present in 66% of patients, and the most frequent defect was supravalvular aortic stenosis (36%). Arterial hypertension was reported in 23%. Hypercalcemia was reported in 10.5% of patients, mainly during the first year of life. Hyperacusis and hypersociability were common complaints (both present in 89%). Other behavioral and neuropsychiatric symptoms reported by the parents included attention deficit (89%), anger crises (83%), excessive fear (66%), depression (64%), anxiety (67%) and hypersexuality (33%). The most common complaints were hypersensitivity to sounds, talkative personality, emotional dependence and learning difficulties. In 98.3%, the parents denied family history. Conclusions: Williams-Beuren syndrome requires close follow-up with different medical specialties due to their variable clinical comorbidities, including language and school learning difficulties, behavioral and psychiatric problems.

RESUMO Antecedentes: A síndrome de Williams-Beauren é doença de acometimento multisistêmico causado pela microdeleção da região 7q11.23. Apesar de haver casos familiares com herança autossômica dominante, a grande maioria dos casos é esporádica. Objetivo: Investigar as principais queixas e achados clínicos da síndrome. Métodos: 757 pais de pacientes inscritos na Associação Brasileira de Síndrome de Williams-Beuren (ABSW) receberam um questionário pelo WhatsApp, entre março e julho de 2017. Resultados: 229 pais de pacientes responderam à pesquisa. A idade de diagnóstico variou de 2 dias até 34 anos (mediana: 3 anos). Os principais achados reportados pelos pais: cólicas abdominais (83,3%), deficiência ponderoestatural (71,5%), dificuldade de alimentação no primeiro ano (68,9%), otite (56,6%), infecções do trato urinário (31,9%), puberdade precoce (27,1%) e escoliose (15,9%). Cardiopatias estavam presentes em 66%, sendo que a mais frequente era a estenose pulmonar supravalvar (36%). Hipertensão arterial foi reportada em 23%. Hipercalcemia foi reportada em 10,5%, principalmente no primeiro ano de vida. Hiperacusia e hiperssociabilidade foram achados comuns (89%). Os principais achados comportamentais e psiquiátricos reportados pelos pais foram: déficit de atenção (89%), crises de raiva (83%), medo excessivo (66%), depressão (64%), ansiedade (67%) e hiperssexualidade (33%). As queixas principais referidas foram hipersensibilidade a sons, personalidade excessivamente amigável, dependência emocional e dificuldades escolares. Em 98,3% dos casos os pais negaram história familial. Conclusões: A síndrome de Williams-Beuren é requer um seguimento e manejo estritos, com diferentes especialidades médicas devido às comorbidades clínicas variadas, que incluem dificuldades de linguagem e aprendizagem escolar, além de dificuldades comportamentais e psiquiátricas.

Natural history of 39 patients with Achondroplasia

OBJECTIVES: To characterize the natural history of 39 achondroplastic patients diagnosed by clinical, radiological and molecular assessments. METHODS: Observational and retrospective study of 39 patients who were attended at a public tertiary level hospital between 1995 and 2016. RESULTS: Diagnosis was made prenatally in 11 patients, at birth in 9 patients and within the first year of life in 13 patients. The most prevalent clinical findings were short stature, high forehead, trident hands, genu varum and macrocephaly. The most prevalent radiographic findings were rhizomelic shortening of the long bones and narrowing of the interpediculate distance of the caudal spine. There was motor developmental delay in 18 patients and speech delay in 16 patients. The most common clinical intercurrences were middle ear dysfunction, sleep apnea, limb pain and obesity from 2 to 9 years of age. One patient was large for the gestational age but did not develop obesity. One patient developed hydrocephalus at 10 years old. The current age of the patients varies from 15 months to 36 years. The molecular study performed by Sanger sequencing of the common heterozygous mutation 1138G>A in FGFR3 was positive in all patients. Four cases were inherited, and 35 were sporadic (paternal age from 19 to 66 years). CONCLUSIONS: The diagnoses were made early based on clinical and radiographic findings. All cases were confirmed molecularly. Despite presenting a benign course, it is necessary to establish a systematic protocol for the surveillance of these patients due to the common clinical intercurrences.

Clinical description of 41 Brazilian patients with oculo-auriculo-vertebral dysplasia / Displasia óculo-aurículo-vertebral: aspectos clínicos de 41 pacientes brasileiros

SUMMARY Objective: To describe the most prominent clinical features of a cohort of patients with oculo-auriculo-vertebral (OAV) dysplasia in Brazil. Method: A review of medical records of patients with diagnosis of OAV from 1990 to 2010 was performed in a medical genetics center. Results: 41 patients were included in the study. Their average age at diagnosis was 2y 10mo (34,4±48,8 months) and the female proportion was 53.7%. Mean maternal age at patient’s birth was 28.5y (min: 17, max: 46y) for mothers and 31.4y (min: 21, max: 51y) for fathers. Most patients (97.5%) had auricular involvement, with facial manifestation in 90.2%, spinal in 65.9%, ocular in 53.7%, 36.6% with cardiovascular involvement, 29.3% urogenital, and 17% of the cases with central nervous system (CNS) involvement. The classic OAV triad was present in only 34%. All patients except one had concomitant problems in other organs or systems. Conclusion: Since the diagnosis of OAV dysplasia relies only on a comprehensive medical evaluation, it is imperative that clinicians be aware of the most common presentation of the syndrome. Once suspected, every patient should undergo a complete medical evaluation of multiple systems including complementary exams. Treatment of these patients is based on surgical correction of malformations and rehabilitation.

RESUMO Objetivo: descrever os principais achados clínicos de uma coorte de pacientes com a displasia óculo-aurículo-vertebral (OAV). Método: revisão de prontuários médicos dos pacientes com diagnóstico de OAV no período de 1990 a 2010, acompanhados em um centro de genética médica. Resultados: foram incluídos no estudo 41 pacientes. A média de idade ao diagnóstico foi de 2 anos e 10 meses (34,4±48,8 meses) e a proporção de pacientes do sexo feminino foi de 53,7%. A média de idade dos pais ao nascimento do paciente foi de 28,5±6,9 anos para as mães e 31,4±7,4 anos para os pais. A maioria dos indivíduos (97,5%) possuía acometimento auricular, 90,2% tinham manifestações faciais, 65,9%, vertebrais, 53,7%, oculares, 36,6%, cardiovasculares, 29,3%, urogenitais e 17%, no sistema nervoso central. Além disso, 34% dos pacientes apresentavam a tríade clássica óculo-aurículo-vertebral, e todos os pacientes exceto um apresentavam concomitantemente problemas em outros órgãos ou sistemas. Conclusão: já que o diagnóstico desta entidade é eminentemente clínico, é imprescindível que os médicos das mais diversas especialidades conheçam os achados mais frequentes na OAV. Diante de um paciente com suspeita diagnóstica, deve ser realizada avaliação detalhada de outros órgãos, tanto clínica como por meio de exames complementares. O tratamento é baseado na correção cirúrgica das malformações e na reabilitação.

Menkes disease: importance of diagnosis with molecular analysis in the neonatal period / Doença de Menkes: importância do diagnóstico com análise molecular no período neonatal

Summary Menkes disease is a congenital disorder caused by changes in copper metabolism derived from mutations in the ATP7A gene. It is characterized by physical and neurological alterations. In the neonatal period, these alterations can be nonspecific, which makes early diagnosis a challenge. Diagnosis can be suspected when there are low levels of ceruloplasmin and serum copper. Molecular analysis confirms the diagnosis. Treatment is parenteral administration of copper histidine. We report a familial case with molecular confirmation. The proband had clinical and biochemical suspicious. Treatment with copper histidine was indicated, but initiated at the age of 2 months and 27 days only. He did not present improvements and died at 6 months. The mother became pregnant again, a male fetus was identified and copper histidine was manufactured during pregnancy. He was born healthy, biochemical markers were reduced and treatment was indicated. Molecular analysis was performed confirming mutation in both the mother and the proband, while the other son did not have mutation, so treatment was discontinued. We support the clinical relevance of molecular confirmation for the correct diagnosis and genetic counseling, once clinical findings in the neonatal period are nonspecific and early treatment with parenteral copper histidine must be indicated.

Resumo A doença de Menkes é causada por uma alteração genética no metabolismo do cobre, por mutações no gene ATP7A. Caracteriza-se por alterações neurológicas e no exame físico. No período neonatal, essas alterações podem ser inespecíficas, o que torna o diagnóstico precoce um desafio. O diagnóstico pode ser suspeitado quando há baixos níveis séricos de cobre e ceruloplasmina. A análise molecular confirma o diagnóstico, e o tratamento deve ser feito com histidina de cobre. Nós relatamos um caso familial de doença de Menkes. O probando apresentava quadro clínico e alterações bioquímicas compatíveis com a doença de Menkes, em consulta com 1 mês de vida. O tratamento foi indicado, mas apenas iniciado com 2 meses e 27 dias. Ele não apresentou melhora clínica e veio a óbito com 6 meses. A mãe teve uma nova gestação, foi identificado um feto do sexo masculino e foi solicitada a manipulação da histidina de cobre ainda durante a gestação. O bebê nasceu saudável, os marcadores bioquímicos estavam diminuídos e o tratamento com histidina de cobre foi indicado. Realizamos a análise molecular, que confirmou mutação no gene ATP7A na mãe e no probando; porém, o outro filho não apresentava mutação e o tratamento foi interrompido. Nós defendemos a importância clínica da confirmação molecular para o correto diagnóstico e o aconselhamento genético da doença de Menkes, uma vez que os achados clínicos e as alterações bioquímicas no período neonatal são inespecíficos, e o tratamento com histidina de cobre parenteral deve ser rapidamente instituído.

Tegumentary manifestations of Noonan and Noonan-related syndromes

OBJECTIVES: Noonan and Noonan-related syndromes are common autosomal dominant disorders with neuro-cardio-facial-cutaneous and developmental involvement. The objective of this article is to describe the most relevant tegumentary findings in a cohort of 41 patients with Noonan or Noonan-related syndromes and to detail certain aspects of the molecular mechanisms underlying ectodermal involvement. METHODS: A standard questionnaire was administered. A focused physical examination and a systematic review of clinical records was performed on all patients to verify the presence of tegumentary alterations. The molecular analysis of this cohort included sequencing of the following genes in all patients: PTPN1, SOS1, RAF1, KRAS, SHOC2 and BRAF. RESULTS: The most frequent tegumentary alterations were xeroderma (46%), photosensitivity (29%), excessive hair loss (24%), recurrent oral ulcers (22%), curly hair (20%), nevi (17%), markedly increased palmar and plantar creases (12%), follicular hyperkeratosis (12%), palmoplantar hyperkeratosis (10%), café-au-lait spots (10%) and sparse eyebrows (7%). Patients with mutations in PTPN11 had lower frequencies of palmar and plantar creases and palmar/plantar hyperkeratosis compared with the other patients. CONCLUSIONS: We observed that patients with mutations in genes directly involved in cell proliferation kinase cascades (SOS1, BRAF, KRAS and RAF1) had a higher frequency of hyperkeratotic lesions compared with patients with mutations in genes that have a more complex interaction with and modulation of cell proliferation kinase cascades (PTPN11). .

A clinical follow-up of 35 Brazilian patients with Prader-Willi Syndrome

OBJECTIVE: Prader-Willi Syndrome is a common etiology of syndromic obesity that is typically caused by either a paternal microdeletion of a region in chromosome 15 (microdeletions) or a maternal uniparental disomy of this chromosome. The purpose of this study was to describe the most significant clinical features of 35 Brazilian patients with molecularly confirmed Prader-Willi syndrome and to determine the effects of growth hormone treatment on clinical outcomes. METHODS: A retrospective study was performed based on the medical records of a cohort of 35 patients diagnosed with Prader-Willi syndrome. The main clinical characteristics were compared between the group of patients presenting with microdeletions and the group presenting with maternal uniparental disomy of chromosome 15. Curves for height/length, weight and body mass index were constructed and compared between Prader-Willi syndrome patients treated with and without growth hormone to determine how growth hormone treatment affected body composition. The curves for these patient groups were also compared with curves for the normal population. RESULTS: No significant differences were identified between patients with microdeletions and patients with maternal uniparental disomy for any of the clinical parameters measured. Growth hormone treatment considerably improved the control of weight gain and body mass index for female patients but had no effect on either parameter in male patients. Growth hormone treatment did not affect height/length in either gender. CONCLUSION: The prevalence rates of several clinical features in this study are in agreement with the rates reported in the literature. Additionally, we found modest benefits of growth hormone treatment but failed to demonstrate differences between patients with microdeletions and those with maternal uniparental disomy. The control of weight gain in patients with Prader-Willi syndrome is complex and does not depend exclusively on growth hormone treatment.

Detection of deletions at 7q11.23 in Williams-Beuren syndrome by polymorphic markers

INTRODUCTION: Williams-Beuren syndrome (WBS; OMIM 194050) is caused by a hemizygous contiguous gene microdeletion at 7q11.23. Supravalvular aortic stenosis, mental retardation, overfriendliness, and ocular and renal abnormalities comprise typical symptoms in WBS. Although fluorescence in situ hybridization is widely used for diagnostic confirmation, microsatellite DNA markers are considered highly informative and easily manageable. OBJECTIVES: This study aimed to test the microsatellite markers for the diagnosis of Williams-Beuren syndrome, to determine the size and parental origin of microdeletion, compare the clinical characteristics between patients with different sizes of the deletion and parental origin. METHODS: We studied 97 patients with clinical diagnosis of Williams-Beuren syndrome using five microsatellite markers: D7S1870, D7S489, D7S613, D7S2476 and D7S489_A. RESULTS AND DISCUSSION: Using five markers together, the result was informative in all patients. The most informative marker was D7S1870 (78.4 percent), followed by D7S613 (75.3 percent), D7S489 (70.1 percent) and D7S2476 (62.9 percent). The microdeletion was present in 84 (86.6 percent) patients and absent in 13 (13.4 percent) patients. Maternal deletions were found in 52.4 percent of patients and paternal deletions in 47.6 percent of patients. The observed size of deletions was 1.55 Mb in 76/ 84 patients (90.5 percent) and 1.84 Mb in 8/84 patients (9.5 percent). SVAS as well as ocular and urinary abnormalities were more frequent in the patients with a deletion. There were no clinical differences in relation to either the size or parental origin of the deletion. CONCLUSION: Using these five selected microsatellite markers was informative in all patients, thus can be considered an alternative method for molecular diagnosis in Williams-Beuren syndrome.

High frequency of autistic traits in Williams-Beuren patients / Alta frequência dos traços de autismo em pacientes com síndrome de Williams-Beuren

Williams-Beuren syndrome is characterized by typical facies, supravalvular aortic stenosis, mental retardation, hyperacusis, and behavioral abnormalities with overfriendly personality and anxiety disorders. It is caused by a microdeletion of contiguous genes located in the 7q11.23 region. We studied 31 patients with the Williams-Beuren syndrome (19 men and 12 women), whose ages ranged from 9 to 26 years-old (median 14 years-old). The Williams-Beuren syndrome diagnosis was confirmed by FISH or microsatellite markers analysis in all patients. The objectives were to evaluate cognitive ability, verbal and total intelligence quotient execution, frequency of visual-spatial deficits, and autistic traits and to compare the results of molecular findings. The tests used were the WISC-III, WAIS-III, Rey Complex Figure and a scale of autistic traits. Their total intelligence quotient scores ranged from 51 to 86 (median of 63): 22 with mild mental retardation, 4 with moderate retardation, 4 classified as borderline and 1 as below average. All patients had marked visual-spatial deficit. The frequency of autistic traits was found in 13 of 31 patients (41.94%), with a predominance in males (ten men and three women). There was no correlation with the incidence of autistic traits in relation to the size of the deletion. This study reinforces the importance of the systematic assessment of cognitive function in Williams-Beuren syndrome patients, and it alerts researchers to the presence of a high frequency of autistic traits, as opposed to the overfriendly personality traits, which is typically showed by Williams-Beuren syndrome patients. These latter data are preliminary and further studies are necessary to confirm this specific finding in Williams-Beuren syndrome patients.

A síndrome de Williams-Beuren é caracterizada por fácies típicos, estenose aórtica supravalvar, retardo mental, hiperacusia e anormalidades comportamentais com personalidade amigável e distúrbios de ansiedade. É causada por microdeleção de genes contíguos localizados na região 7q11.23. Foram estudados 31 pacientes com a síndrome de Williams-Beuren (19 homens e 12 mulheres), cujas idades variaram de 9 a 26 anos (mediana de 14 anos). O diagnóstico da síndrome de Williams-Beuren foi confirmado pelo FISH (Fluorescence In Situ Hibridisation) ou por análise de marcadores microssatélites em todos os pacientes. Os objetivos foram: avaliar a capacidade cognitiva, o quociente de inteligência de execução verbal e total, a frequência de déficits visoespaciais, traços autistas; e comparar os resultados dos achados moleculares. Os testes utilizados foram: WISC-III, WAIS-III, Figuras Complexas de Rey e Escala de Traços Autísticos. Os pacientes apresentaram déficit cognitivo em todos os testes, o quociente de inteligência total variou de 51 a 86 (mediana de 63): 22 com deficiência mental leve, 4 com deficiência mental moderada; 4 limítrofes e 1 com média inferior. Os pacientes apresentaram déficit visoespacial. A frequência de traços autistas foi encontrada em 13 dos 31 pacientes (41,94%), com predomínio no sexo masculino (dez homens e três mulheres). Não foi encontrada correlação entre a presença de traços autísticos em relação ao tamanho da deleção. O presente estudo reforça a importância da avaliação sistemática da função cognitiva em pacientes com a síndrome de Williams-Beuren e alerta para a presença da alta frequência de traços autistas, que é o oposto da personalidade amigável tipicamente encontrada em pacientes com síndrome de Williams-Beuren. Estes últimos dados são preliminares e novos estudos serão necessários para confirmar este achado específico na síndrome de Williams-Beuren.

Co-occurring PTPN11 and SOS1 gene mutations in Noonan syndrome: does this predict a more severe phenotype? / Coocorrência de mutações nos genes PTPN11 e SOS1 na síndrome de Noonan: este achado prediz um fenótipo mais grave?

Noonan syndrome (NS) is an autosomal dominant disorder, with variable phenotypic expression, characterized by short stature, facial dysmorphisms and heart disease. Different genes of the RAS/MAPK signaling pathway are responsible for the syndrome, the most common are: PTPN11, SOS1, RAF1, and KRAS. The objective of this study was to report a patient with Noonan syndrome presenting mutations in two genes of RAS/MAPK pathway in order to establish whether these mutations lead to a more severe expression of the phenotype. We used direct sequencing of the PTPN11, SOS1, RAF1, and KRAS genes. We have identified two described mutations in heterozygosity: p.N308D and p.R552G in the genes PTPN11 and SOS1, respectively. The patient has typical clinical features similar to the ones with NS and mutation in only one gene, even those with the same mutation identified in this patient. A more severe or atypical phenotype was not observed, suggesting that these mutations do not exhibit an additive effect.

A síndrome de Noonan (SN) é uma doença gênica autossômica dominante, com expressão clínica variável, caracterizada por baixa estatura, dismorfismos faciais e cardiopatia. Diferentes genes da via de sinalização RAS/MAPK são responsáveis pela síndrome, sendo as mais frequentes: PTPN11, SOS1, RAF1 e KRAS. O objetivo deste estudo foi relatar um paciente com SN que apresenta mutações em dois genes da via RAS/MAPK a fim de estabelecer se essas mutações levam a uma expressão mais grave do fenótipo. Utilizou-se sequenciamento direto dos genes PTPN11, SOS1, RAF1 e KRAS. Foram identificadas duas mutações em heterozigose previamente descritas: p.N308D e p.R552G nos genes PTPN11 e SOS1, respectivamente. A paciente apresenta quadro clínico típico semelhante ao dos pacientes com SN e mutação em um único gene, mesmo naqueles com a mesma mutação identificada na paciente. Não foi observado um fenótipo mais grave ou atípico na paciente, sugerindo que as mutações não apresentam um efeito aditivo.

Trissomia, Tetrassomia e pentassomia do cromossomo X: relato de 11 casos / X chromosome trisomy, tetrasomy, pentasomy: report of 11 cases

Objetivo: apresentar o quadro clínico de pacientes com trissomia, tetrassomia e pentassomia do cromossomo X...

Objective: to present the clinical findings featured by patients bearing chromossome X trisomy, tetrasomy and pentasomy...

Anormalidades cromossômicas nos pacientes atendidos em serviço de genética / Chromosomal abnormalities in patients assisted at a genetics service

Objetivo: avaliar a frequência das aberrações cromossômicas encontradas nos pacientes atendidos em um serviço de genética. Casuística e métodos: foi realizado estudo retrospectivo dos registros de cariótipos de pacientes atendidos no Instituto da Criança no período de 1992-2002...

Objective: to access the frequency of chromosomal abnormalities observed in patients assisted at a genetics service. Patients and methods: a retrospective study was carried out regarding the recorded karyotype of patients assisted at Instituto da Criança within the period of 1992-2002...

Achados radiológicos em pacientes com mucopolissacaridose tipo VI (síndrome de Maroteaux-Lamy) / Radiological findings in patients with mucopolysaccharidosis type VI (Maroteaux-Lamy syndrome)

OBJETIVO: Sistematizar os achados radiológicos dos pacientes com mucopolissacaridose VI atendidos na Unidade de Genética e no Serviço de Diagnóstico por Imagem do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo. MATERIAL E MÉTODO: Cinco pacientes com mucopolissacaridose VI (dois meninos e três meninas) foram incluídos no estudo, e em todos foi realizado estudo radiológico completo. RESULTADOS: A idade variou de oito anos e um mês a 20 anos e cinco meses (idade média de 14 anos e dois meses). Os achados radiológicos observados em todos os pacientes foram: macrocefalia, fechamento precoce das suturas, costelas " em forma de remo", fossa glenóidea hipoplásica, úmero proximal "em forma de machado", teto acetabular hipoplásico e irregular, colo femoral afilado, ossos do carpo pequenos e irregulares. CONCLUSÃO: Os pacientes apresentaram achados radiológicos compatíveis com a doença. O paciente de maior idade, em estágio mais evoluído, apresentou achados mais acentuados, comprovando ser uma doença progressiva. O estudo radiológico é um auxílio para o diagnósltico e evolução clínica.

OBJECTIVE: To systematize the radiological findings in patients diagnosed with mucopolysaccharidosis VI examined at the Genetic Unit and at the Image Diagnostic Service of "Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo". MATERIAL AND METHOD: Five patients with mucopolysaccharidosisVI (two boys and three girls) were included in this study. A complete X-Ray survey was performed in all patient. RESULTS: The patients age rangedfrom 8y1mo to 20y5mo (mean age 14y2mo). The radiological findings observed in all patients were: macrocephaly, premature closure of the sutures, oar shaped ribs, hypoplastic glenoid fossae, hatchet-like aspect of the proximal humerus, irregular and hypoplastic acetabular roofs, thin femoral neck and small and irregular carpal bones. CONCLUCION: The radiographic findings seen on patients were consistent with the disease. Marked findings that confirmed the progression of the disease were seen in the oldest patient with the most advanced stage of the disease. X-ray survey was an important supportive method for the diagnosis and follow-up of clinical progress.

Estudo do gene PTPN11 nos pacientes afetados pela síndrome de Noonan / The PTPN11 gene analysis in Noonan syndrome patients

A análise do gene PTPN11 foi realizada em 50 probandos com síndrome de Noonan e 8 com síndrome de Noonan-like. Na síndrome de Noonan foram identificadas mutações missense em 42 por cento dos afetados, corroborando a heterogeneidade genética desta doença. A mutação T73I parece predispor a uma doença mieloproliferativa na síndrome de Noonan, embora uma correlação genótipo-fenótipo ainda não tenha sido estabelecida. O gene PTPN11 é o principal responsável pela síndrome de LEOPARD (3/3 pacientes com mutação) e, em parte, pelas síndromes da neurofibromatose-Noonan (1 com mutação) e Noonan-like/lesões múlitplas de células gigantes (1/3 com mutação) / A PTPN11 gene analysis was performed in 50 Noonan and 8 Noonan-like syndrome probands. Missense mutations were identified in 42 per cent of the Noonan syndrome cohort, corroborating the idea of its genetic heterogeneity. A definitive genotype-phenotype correlation was not established, but the T73I mutation seems to predispose to a myeloproliferative disorder in Noonan syndrome. The PTPN11 gene is the main one in LEOPARD syndrome (3/3 patients with the same mutation) and it plays a role in neurofibromatosis-Noonan (one patient had a PTPN11 gene mutation) and Noonan-like/multiple giant cell lesion syndromes (1/3 with a PTPN11 gene mutation)...

Síndromes genéticas e cardiopatia / Genetic disorders and cardiac anomalies

A genética como ciência ue trata dos mecanismos que controlam a constância e as mudanças que se operam nos seres vivos, nasceu com a descoberta dos princípios mendelianos, em 1865. Contudo, o reconhecimento desses preceitos só passou a ser valorizado depois de cerca de 35 anos. Desde então, essa área tem se desenvolvido de forma espantosa.Novos conhecimentos não param de surgir, como o reconhecimento de novos modelos de herança que não os tradicionais (como por exemplo:dissomia uniparental e herança mitocondrial; polimorfismos, microdeleções e genes contíguos, região telométrica e seu papel no retardo mental; presença de diferentes fenótipos cujo substrato pode ser explicado pelo mesmo tipo de mutação e vice-versa; identificação de alguns genes importantes das doenças poligênicas), sem contar com o ápice de todo esse avanço biológico, representado pelos resultados do Projeto Genoma Humano.Muitos são os campos de interesse da genética humana; na prática da genética clínica, é de importância fundamental o reconhecimento ao menos de alguns distúrbios genéticos mais frequentes, para que seu diagnóstico, prevenção, tratamento e devido aconselhamento sejam procedidos de forma adequada e as implicações desse manejo apropriado possam se fazer sentir na área da saúde pública.Por essa razão, o enfoque de algumas doenças genéticas mais comumente observadas na prática clínica e que possam, porventura, assolar os cardiologistas, justamente pela frequencia elevada com que determinados defeitos cardíacos em seus portadores estejam presentes, foi motivo deste trabalho, com o intuito de que seu reconhecimento seja o mais precoce possível

Uso da análise de Fish para diagnóstico em 11 pacientes com síndrome de Williams-Beuren / Use of Fish analysis to diagnosis approach of 11 Brazilian patients with Williams-Beuren syndrome

A síndrome de Williams-Beuren (SWB) é uma rara síndrome de deleçäo de genes contíguos que feta múltiplos sistemas. A doença é causada por uma deleçäo submicroscópica na regiäo 7q11.23, que é detectada pela análise de Fish em 90-95 por cento dos pacientes. Relatamos o estudo clínico e a análise citogenética por Fish realizados em 11 pacientes (6M:5F), todos esporádicos. Fácies típicos de "duende", atraso de desenvolvimento/retardo mental, anomalias dentárias e esqueléticas estavam presentes em todos os pacientes; anomalias oculares em dez (91 por cento); cardiopatias congênitas em oito (73 por cento), sendo metade, estenose supravalvar aórtica; baixa estatura em seis (54 por cento); hipercalcemia transitória em quatro (36 por cento); hérnia inguinal em três (27 por cento) e anomalias renais em dois (18 por cento). Analisanmos a hemizigosidade do gene da elastina por Fish, utilizando a sonda LSI Williams Syndrome Region DNA Fish (Vysis) nas células interfásicas e metafásicas. O paciente sem deleçäo apreentava fácies e comportamento tópico, exceto cardiopatia. A análise pelo Fish do locus da elastina é um teste útil para confirmaçäo diagnóstica da SWB, o que auxilia no seguimento clínico adequado e na prevençäo das complicaçöes

Achados cardíacos em 31 pacientes com síndrome de Noonan / Cardiac findings in 31 patients with Noonan's syndrome

OBJECTIVE: To evaluate cardiac findings in 31 Noonan syndrome patients. METHODS: Thirty-one (18 males and 13 females)patients from 26 families affected with Noonan's syndrome were evaluated from the cardiac point of view with electrocardiography and echodopplercardiography. RESULTS: Twenty patients had some type of cardiac abnormality. The most frequent was pulmonary valve stenosis followed by hypertrophic myocardiopathy, commonly associated with valve defects. Upper deviation of the QRS axis was observed in 80 percent of these patients. CONCLUSION: In view of the high frequency and diversity of cardiac abnormalities present in Noonan syndrome, cardiac evaluation with electrocardiography and echocardiography should be performed in all patients diagnostically suspected of having this disease