RESUMO
Parry Romberg disease and En Coupe de Sabre Scleroderma are frequently associated disorders that affect the face and can cause severe aesthetic and functional impairment. Systemic immunosuppression is the gold standard of first-line treatment in the pediatric rheumatology standpoint although it is often delayed in the pediatric dermatology clinics and more often used in cases of refractory neurological impairment. We report on a case with dental root resorption and severe periodontal bone inflammation detected on magnetic resonance imaging, which was successfully treated with the anti-IL-6 agent tocilizumab.
RESUMO
Progressive hemifacial atrophyor Parry-Romberg syndromeis a rare disease, classified as one of the forms of localized morphea or scleroderma. Its cause is unknown. It is characterized by atrophy of the skin, fat, muscles and underlying osteocartilaginous structures that usually affects the face and neck unilaterally, and is associated with neurological symptoms (secondary epilepsy) and involvement of other organs and systems. Its course is slow and progressive and begins in the first two decades of life. Predilection for female sex has been observed. We report the case of a 10-year-old girl diagnosed at the Hipólito Unánue Hospital in Tacna, Peru. Knowledge of this condition is important in the differential diagnosis of localized morpheas or scleroderma.
La atrofia hemifacial progresiva o síndrome de Parry-Romberg es una enfermedad rara, clasificada como una de las formas de morfea o esclerodermia localizada. Su causa es desconocida. Se caracteriza por la atrofia de la piel, tejido celular subcutáneo, músculos y estructuras osteocartilaginosas subyacentes que afecta usualmente unilateralmente la cara y cuello, se asocia a síntomas neurológicos y afección de otros órganos y sistemas. Su curso es lento y progresivo y se inicia generalmente en las primeras dos décadas de la vida. Se ha observado predilección por el sexo femenino. Presentamos el caso de una niña de 10 años, diagnosticada en el Hospital Hipólito Unánue de Tacna, Perú.
Assuntos
Hemiatrofia Facial/diagnóstico , Esclerodermia Localizada/diagnóstico , Criança , Diagnóstico Diferencial , Hemiatrofia Facial/fisiopatologia , Feminino , Humanos , Peru , Doenças Raras/diagnóstico , Doenças Raras/fisiopatologia , Esclerodermia Localizada/fisiopatologiaRESUMO
BACKGROUND: Parry-Romberg syndrome is characterized by progressive hemiatrophy of the skin, subcutaneous tissue, muscle and bones of the skull. Its incidence is low, with a progressive and slow course. Its etiology is unknown, but it has been associated with several factors. Its clinical presentation involves dermatological, musculoskeletal and neuropsychiatric manifestations. The treatment consists of medical and surgical strategies. The use of steroids, alone or in combination with immunomodulators, has the objective of slowing down progression. The surgical treatment lies in facial reconstruction or volumetric regeneration, to correct the appearance and function of facial structures. The objective is to show three cases of Parry-Romberg syndrome with the representative characteristics of the disease. CLINICAL CASEs: 1) A 41-year-old woman with atrophy and right supraciliary hypochromia associated with seizures and headache. 2) A 43-year-old woman with parietal deformation and right supraciliary atrophy, associated with facial paralysis, depression and headache. 3) A 36-year-old woman with right hemifacial atrophy associated with ocular involvement and headache. The indicated treatment was based on a systemic steroid plus a cytostatic agent. The surgical treatment was evaluated according to the affection of facial structures. CONCLUSIONS: Parry-Romberg syndrome is a rare disease, characterized by progressive atrophy. Clinical manifestations determine the diagnosis and early start of medical and surgical treatment.
INTRODUCCIÓN: El síndrome de Parry-Romberg se caracteriza por hemiatrofia progresiva de la piel, el tejido subcutáneo, los músculos y los huesos del cráneo. Su incidencia es baja, y su curso es progresivo y lento. Se desconoce su etiología, pero se ha asociado a diversos factores. Su presentación clínica involucra manifestaciones dermatológicas, musculoesqueléticas y neuropsiquiátricas. El tratamiento consiste en estrategias médicas y quirúrgicas. El uso de esteroides, solos o en combinación con inmunomoduladores, tiene el objetivo de frenar la progresión. El tratamiento quirúrgico consiste en reconstrucción facial o regeneración volumétrica, a fin de corregir la apariencia y la función de las estructuras faciales. Se presentan tres casos de síndrome de Parry-Romberg con las características representativas de la enfermedad. CASOS CLÍNICOS: 1) Mujer de 41 años, con atrofia e hipocromía supraciliar derecha, asociadas a crisis convulsivas y cefalea. 2) Mujer de 43 años, con deformación parietal y atrofia supraciliar derecha, asociadas a parálisis facial, depresión y cefalea. 3) Mujer de 36 años, con atrofia hemifacial derecha asociada a afección ocular y cefalea. El tratamiento se basó en esteroide sistémico más un agente citostático. El tratamiento quirúrgico se valoró de acuerdo con la afectación de la estructuras faciales. CONCLUSIONES: El síndrome de Parry-Romberg es una enfermedad rara caracterizada por una atrofia progresiva. Las manifestaciones clínicas determinan el diagnóstico y el inicio temprano del tratamiento médico y quirúrgico.
Assuntos
Hemiatrofia Facial , Síndromes Neurocutâneas , Adulto , Face , Hemiatrofia Facial/complicações , Hemiatrofia Facial/diagnóstico , Feminino , HumanosRESUMO
INTRODUCCIÓN: el Síndrome de Parry-Romberg es un trastorno neurocutáneo, muy raro, caracterizado por hemiatrofia facial progresiva, su primer signo clínico es la asimetría facial, se presenta frecuentemente de manera simultánea con la esclerodermia lineal. PRESENTACIÓN DE CASO: femenina de 54 años de edad, con antecedente de hemiatrofia facial y alteración oftalmológica izquierda desde los 14 años. DISCUSIÓN: el Síndrome de Parry-Romberg inicia entre las primeras décadas de la vida con hiperpigmentación, atrofia de la dermis, grasa subcutánea, músculo y huesos subyacentes. La atrofia afecta la hemicara siguiendo la distribución del nervio trigémino y sus ramas; este caso coincidió con la edad de inicio, la lesión se limitó a la hemicara izquierda. CONCLUSIÓN: debe tenerse presente como diagnóstico diferencial en pacientes con alteración en la simetría facial de larga evolución sin causa aparente, el diagnóstico temprano evita las complicaciones graves, se recomienda un manejo multidisciplinario para mejorar la calidad de vida de los pacientes.
INTRODUCTION: parry-Romberg Syndrome is a neurocutaneous disorder, very rare and characterized by progressive facial hemiatrophy, the first clinical sign is facial asymmetry. SPR occurs simultaneously with high frequency with linear scleroderma. CASE PRESENTATION: a 54-year-old female, with a history of left facial hemiatrophy since she was 14 years old, presented a left ophthalmological alteration. DISCUSSION: Parry-Romberg Syndrome begins in the first decades of life with hyperpigmentation, atrophy of the dermis, subcutaneous fat, muscle and underlying bones. Atrophic affects the hemicara with distribution of the trigeminal nerve and its branches; this case coincided with the age of onset and the lesion was limited to the left hemicra. CONCLUSION: it should be borne in mind as a differential diagnosis in patients with long-standing facial symmetry alteration without apparent cause, early diagnosis avoids serious complications, multidisciplinary management is recommended to improve the quality of life of patients.
Assuntos
Feminino , Pessoa de Meia-Idade , Atrofia , Síndrome , Qualidade de Vida , Afeto , Assimetria FacialRESUMO
Introducción: La hemiatrofia facial progresiva (HFP) o síndrome de Parry-Romberg y la morfea en golpe de sable (MGS) forman parte de las morfeas lineales cefálicas. Son enfermedades inflamatorias crónicas de la piel y tejidos subyacentes, que se caracterizan por esclerosis y atrofia cutánea. Objetivos: Describir las características clínicas, manifestaciones asociadas, histología, laboratorio, estudios complementarios y tratamientos instaurados. Diseño: Estudio retrospectivo descriptivo. Materiales y métodos: Se revisaron las historias clínicas de pacientes con morfea evaluados en el Sector Colagenopatías desde julio de 2010 hasta diciembre de 2016. Resultados: De 56 pacientes, 11 cumplieron con los criterios de inclusión, 7 con diagnóstico de HFP, 2 con MGS y 2 con ambas patologías. El 64% fueron mujeres. Las manifestaciones extracutáneas se presentaron en el 64% de los casos. El tratamiento utilizado en todos los pacientes fue el metotrexato, asociado o no, al uso de corticosteroides sistémicos. Conclusiones: La mayoría de nuestros resultados concuerdan con la bibliografía consultada, excepto las manifestaciones asociadas. Destacamos el tratamiento asociado de metotrexato y pulsos de corticosteroides intravenosos con resultados satisfactorios y bien tolerado. (AU)
Introduction: Progressive facial hemiatrophy (PFH) or Parry-Romberg Syndrome and morphea en coup de sabre are cephalic linear morpheas. They are chronics inflammatories diseases of the skin and underlying tissues, characterized by cutaneous atrophy and sclerosis. Objectives: To describe clinical features, associated extracutaneous manifestations, histological and laboratory findings, imaging and diagnostic modalities and treatments established in patients with diagnosis of HFP, MGS, or both, evaluated in our Department. Design: Retrospective descriptive study. Materials and methods: We included medical histories of patients diagnosed with morphea evaluated in Collagenopathy Sector from July 2010 up to December 2016. Results: Of 56 patients, 11 met the inclusion criteria, 7 with diagnosis of PFH, 2 with morphea en coup de sabre and 2 with both pathologies. 64% were women. 64% showed extracutaneous manifestations. The treatment used in all of the patients was methotrexate, associated or not, with the use of systemic corticosteroids. Conclusions: Most of our results agree with the bibliography consulted, with the exception of the associated manifestations. We emphasize the associated treatment of methotrexate and intravenous corticosteroid pulses with satisfactory results and well tolerated. (AU)
Assuntos
Humanos , Masculino , Feminino , Adolescente , Adulto , Pessoa de Meia-Idade , Adulto Jovem , Esclerodermia Localizada/diagnóstico , Hemiatrofia Facial/diagnóstico , Esclerodermia Localizada/complicações , Esclerodermia Localizada/tratamento farmacológico , Metotrexato/uso terapêutico , Estudos Retrospectivos , Corticosteroides/uso terapêutico , Fármacos Dermatológicos/uso terapêutico , Hemiatrofia Facial/complicações , Hemiatrofia Facial/tratamento farmacológicoRESUMO
Resumen El Síndrome de Parry Romberg es una enfermedad idiopática, caracterizado por la atrofia de tejido celular subcutáneo. Su signo clínico principal es la hemiatrofia facial progresiva con inclusión de piel, tejido subcutáneo, nervios, músculo y/o hueso. Se han propuesto diversas teorías, entre ellas el posible origen hereditario y genético de esta patología, debido a que se ha manifestado algunas veces en miembros de una misma familia. Se presenta un caso de una paciente con síndrome de Parry Romberg de inicio tardío, que cursó con atrofia de hemicara derecha desde los 20 años de edad asociada a epilepsia refractaria al tratamiento y con antecedente patológico familiar de un hermano que presenta igualmente atrofia en hemicara derecha y una marcada esclerodermia en golpe de sable.
Abstract Parry Romberg syndrome is an idiopathic disease, characterized by subcutaneous tissue atrophy. Its main clinical sign is progressive facial hemiatrophy including: skin, subcutaneous tissue, nerves, muscle and/or bone. Several theories have been mentioned, among them the possible hereditary and genetic origin of this disorder, as the manifestation of this disease sometimes is seen in members of the same family. We present a case: a patient with late presentation Parry Romberg, with right side face atrophy associated with refractory epilepsy and family history of a brother who presents right side face atrophy as well and a marked scleroderma in coup of saber.
RESUMO
The Parry-Romberg syndrome is a rare degenerative disease of unknown etiology that has dental implications. It is characterized by a progressive hemifacial atrophy that appears in the early stages of life. It causes aesthetic, functional and psychological alterations, and has social implications for the patient. There is no definitive treatment for the Parry-Romberg syndrome. Systemic and immune alterations produce oral and maxillofacial manifestations, which need to be managed by specialized dental professionals. The aim of this paper is to do a literature review of the Parry-Romberg syndrome and describe the oral and clinical characteristics of this condition in a 12-year-old male pediatric patient, who had a history of neurological disorders and facial asymmetry on the left side. Dentists require an adequate knowledge of the clinical and dental characteristics of this syndrome. With early diagnosis and appropriate surgical and orthodontic treatment at an early age, they can improve the quality of life of patients and minimize invasive long-term effects...
El síndrome de Parry-Romberg es una rara enfermedad degenerativa de etiología desconocida con implicaciones odontológicas. Se caracteriza por una atrofia progresiva que aparece a temprana edad, generalmente hemifacial. Tiene alteraciones estéticas, funcionales, psíquicas y sociales, no existiendo un tratamiento definitivo. Las manifestaciones orales y maxilofaciales de este síndrome son parte de una afectación sistémica e inmunológica, lo cual resalta la necesidad de su conocimiento y manejo por parte de los profesionales de la odontología. El objetivo de este reporte es describir las características clínicas y orales del Síndrome de Parry-Romberg en un paciente pediátrico masculino de 12 años de edad con antecedentes neurológicos que presenta una asimetría facial izquierda, presentado en conjunto una revisión bibliográfica de este síndrome. Las características clínicas y dentales de este síndrome como parte de una afectación sistémica requieren de un adecuado conocimiento por parte del profesional dental, el cual con un diagnóstico precoz y un adecuado tratamiento quirúrgico y ortodontico a temprana edad para mejorar la calidad de vida del paciente y minimizar los efectos invasivos a largo plazo...
Assuntos
Humanos , Masculino , Criança , Doenças da Boca/cirurgia , Doenças da Boca/etiologia , Hemiatrofia Facial/complicações , Hemiatrofia Facial/cirurgia , SíndromeRESUMO
Síndrome de Parry-Romberg é uma doença rara caracterizada por atrofia hemifacial progressiva associada a outras alterações sistêmicas, dentre elas, neurológicas. Atualmente, são poucos os trabalhos que exploraram sequências avançadas em ressonância magnética nesta enfermidade. Neste artigo, relatamos o caso de um paciente com 45 anos e descrevemos os achados de ressonância magnética estrutural e em sequências avançadas, correlacionando com dados fisiopatológicos.
Parry-Romberg syndrome is a rare disease characterized by progressive hemifacial atrophy associated with other systemic changes, including neurological symptoms. Currently, there are few studies exploring the utilization of advanced magnetic resonance sequences in the investigation of this disease. The authors report the case of a 45-year-old patient and describe the findings at structural magnetic resonance imaging and at advanced sequences, correlating them with pathophysiological data.
RESUMO
Introdução: Síndrome de Parry-Romberg (SPR) é caracterizada pela atrofia hemifacial progressiva que, muitas vezes, resulta em graves distúrbios estéticos e funcionais. Embora existam escalas de gravidade, nenhuma delas é completamente ideal para auxiliar na abordagem terapêutica destes pacientes. O objetivo deste estudo foi delinear as estratégias cirúrgicas para o tratamento da SPR baseado em um novo sistema de classificação de gravidade da doença. Método: Trata-se de uma análise retrospectiva dos pacientes com SPR operados em 2005-2011. As abordagens cirúrgicas foram individualizadas de acordo com a escala de gravidade clínica baseada na evolução da doença: tipos I (envolvimento da epiderme, derme e tecido subcutâneo); II (tipo I + envolvimento muscular); e III (tipo I + II + envolvimento ósseo). Quatro (28,57%) pacientes com SPR tipo I, 6 (42,85%) tipo II e 4 (28,57%) tipo III foram incluídos. Resultado: Um total de 47 procedimentos foi realizado. Gordura livre foi enxertada em todos os pacientes. Todos os pacientes do tipo II e 1 (25%) do tipo III foram submetidos a enxertos dermogordurosos. Enxertos ósseos com retalhos de fáscia têmporo-parietal foram aplicados no tratamento de todos os pacientes do tipo III. Um (25%) paciente do tipo III foi submetido à cirurgia ortognática. Houve melhora global na aparência facial em todos os pacientes, sem complicações relacionadas aos procedimentos. Conclusão: O sistema de classificação de gravidade proposto para a SPR pode facilitar a decisão terapêutica e resultados parcialmente satisfatórios podem ser alcançados com a combinação de técnicas cirúrgicas de acordo com a gravidade da doença.
Introduction: The Parry-Romberg Syndrome (PRS) is characterized by progressive hemifacial atrophy that often leads to severe esthetic and functional difficulties. Although there are systems for grading disease severity, none have proven ideal in optimizing the therapeutic approach to these patients. This study aimed to establish the surgical strategies for the treatment of PRS based on a new system for severity grading of the disease. Methods: This retrospective study included PRS patients undergoing surgery between 2005 and 2011. The surgical strategies were adapted for each patient according to a clinical severity grading system based on disease progression: type I, affecting the epidermis, dermis, and subcutaneous tissue; type II, type I + muscle involvement; and type III, Types I+ II + bone involvement. The sample included four patients (28.57%) with PRS type I, six patients (42.85%) with PRS type II, and four patients (28.57%) with PRS type III. Results: Forty-seven procedures were performed. Free-fat grafts were used in all patients. Dermal fat grafts were used in all type II patients and one type III patient (25%). Bone grafts with temporoparietal fascia flaps were performed for the treatment of all type III patients. One type III patient (25%) underwent orthognathic surgery. All patients were improved in their overall facial appearance and there were no procedure-related complications. Conclusion: Our proposed system for grading PRS severity can facilitate the choice of therapeutic approaches and with a combination of surgical techniques based on the severity of the disease partially satisfactory outcomes can be attained.
Assuntos
Humanos , Masculino , Feminino , Criança , Adolescente , Cirurgia Plástica , Relatos de Casos , Prontuários Médicos , Estudos Retrospectivos , Anormalidades Craniofaciais , Transplantes , Estudo de Avaliação , Face , Ossos Faciais , Hemiatrofia Facial , Cirurgia Plástica/métodos , Prontuários Médicos/normas , Anormalidades Craniofaciais/cirurgia , Anormalidades Craniofaciais/patologia , Transplantes/cirurgia , Face/cirurgia , Ossos Faciais/cirurgia , Hemiatrofia Facial/cirurgia , Hemiatrofia Facial/etiologia , Hemiatrofia Facial/patologiaRESUMO
Parry-Romberg syndrome is a rare disease characterized by progressive hemifacial atrophy associated with other systemic changes, including neurological symptoms. Currently, there are few studies exploring the utilization of advanced magnetic resonance sequences in the investigation of this disease. The authors report the case of a 45-year-old patient and describe the findings at structural magnetic resonance imaging and at advanced sequences, correlating them with pathophysiological data.
Síndrome de Parry-Romberg é uma doença rara caracterizada por atrofia hemifacial progressiva associada a outras alterações sistêmicas, dentre elas, neurológicas. Atualmente, são poucos os trabalhos que exploraram sequências avançadas em ressonância magnética nesta enfermidade. Neste artigo, relatamos o caso de um paciente com 45 anos e descrevemos os achados de ressonância magnética estrutural e em sequências avançadas, correlacionando com dados fisiopatológicos.
RESUMO
La Morfea es una forma de presentación clínica de la esclerodermia localizada, que generalmente se manifiesta como una placa eritematosa con un anillo lila que evoluciona a placa atrófica. Existen presentaciones atípicas de morfea en que al inicio la piel afectada simula ser una malformación vascular tipo nevus flameus o mancha en vino de oporto. El Síndrome Parry-Romberg corresponde a una morfea localizada que se caracteriza por hemiatrofia facial que afecta la funcionalidad de la cara y que puede comprometer piel, tejido muscular y hueso. El objetivo de este artículo es presentar, por medio de un caso clínico, una entidad rara de morfea que al inicio simula ser un nevusflameus. El nevus flameus adquirido es raro y requiere tiempo para que se inicien los cambios escleróticos. Se presenta el caso de un niño de 8 años que consultó por un cuadro atípico sospechoso de nevus flameus y que al cabo de 3 años evolucionó como una hemiatrofia facial progresiva. Los pacientes con diagnóstico de nevus flameus adquirido deberían monitorizarse en busca de signos de evolución a morfea y si la ubicación es en la cara siempre debe sospecharse un Síndrome Parry-Romberg para el inicio temprano de terapia y disminuir las consecuencias asociadas.
Morphea is a clinical presentation of the localized scleroderma, which usually manifests as an erythematous plaque with a purple halo that evolves to an atrophic plaque. There are atypical presentations of the morphea that, at the beginning, the affected skin simulates being a vascular malformation port wine stain simil. The Parry-Romberg Syndrome corresponds to a localized morphea that characterizes for showing a facial hemiatrophy that affects the facial functionality and may compromise the skin, muscular tissue and bones. The objective of this paper is to present, through a clinical case, a rare entity of the morphea that at the beginning simulates being a port wine stain. The acquired port wine stain is rare and requires some time to show sclerotic changes. A clinical case of an 8 years old patient that consulted for a suspicion of an atypical clinical picture of port wine stain and that after 3 years evolved in a progressive facial hemiatrophy is presented. The patients with an acquired port wine stain diagnosis should be monitored to find signs of an evolution to morphea and if it is located on the face there should always be a suspicion of a Parry Romberg syndrome in order to start earlier the therapy and reduce the associated consequences.
Assuntos
Humanos , Masculino , Criança , Esclerodermia Localizada/diagnóstico , Esclerodermia Localizada/patologia , Fármacos Dermatológicos , Esclerodermia Localizada/complicações , Esclerodermia Localizada/tratamento farmacológico , Hemiatrofia Facial/complicações , Mancha Vinho do Porto/complicações , Metotrexato/uso terapêuticoRESUMO
La Atrofia Hemifacial Progresiva (AHP) o Síndrome Parry Romberg, es una enfermedad degenerativa rara, caracterizada por una lenta y progresiva atrofia facial unilateral que afecta al tejido celular subcutáneo, cartílago, tejido graso y estructuras óseas subyacentes, que frecuentemente se solapa con una condición conocida como esclerodermia lineal en corte de sable. Hasta donde se conoce no se ha reportado en la literatura la asociación de este síndrome a algún tipo de inmunodeficiencia. Se presenta el caso de un niño de 5 años con AHP, con historia de procesos infecciosos recurrentes, algunos graves, desde que tenía 7 meses de nacido. En el estudio inmunológico se observó la presencia de anticuerpos antinucleares con patrón homogéneo y de anticuerpos anti-DNA de doble cadena. La cuantificación de las subpoblaciones linfocitarias mostró una disminución de los valores de células T/CD3+ y T/CD4+, con valor normal de células B/CD19+. Se diagnosticó una inmunodeficiencia de células T. El hallazgo de una inmunodeficiencia celular en un paciente con AHP es expresión de la gran variabilidad clínica de esta enfermedad y de la importancia que tiene su diagnóstico temprano
The progressive hemifacial atrophy (AHP) or Parry Romberg syndrome, is a rare degenerative disease, characterized by slowly progressive unilateral facial atrophy involving the subcutaneous tissue, cartilage, fat tissue and underlying bone structures, which often overlaps with a condition known as linear scleroderma en coup of sabre. To our knowledge has not been reported the association between immunodeficiency and this syndrome. We report the case of a child of 5 years with AHP, with a history of recurrent infectious processes, some serious, since he was 7 months old. The immunological study showed T cell immunodeficiency, lymphocyte subpopulations showed T/CD4 T/CD3 + cells values decreased and normal value B/CD19 + cells. The presence of antinuclear homogeneous pattern and anti-dsDNA antibodies confirm de autoimmune disorders described in these patients. The cellular immunodeficiency with AHP is an expression of great clinical variability of this disease and the importance of early diagnosis
Assuntos
Humanos , Masculino , Pré-Escolar , Hemiatrofia Facial/complicações , Hemiatrofia Facial/imunologia , Linfócitos T/imunologiaRESUMO
Progressive facial hemiatrophy, also known as Parry-Romberg syndrome, is a progressive and self-limited deformation of the subcutaneous tissue volume on one side of the face that creates craniofacial asymmetry. We present the case of a patient with a five-year history of progressive right facial hemiatrophy, who underwent facial volumetric restoration using cell-assisted lipotransfer (CAL), which consists of an autologous fat graft enriched with adipose-derived stem cells (ASCs) extracted from the same patient. ASCs have the capacity to differentiate into adipocytes. They also promote angiogenesis, release angiogenic growth factors, and some can survive as stem cells. The use of autologous fat as a filler in soft tissue atrophy has been satisfactory in patients with mild and moderate Parry-Romberg syndrome. Currently, CAL has showed promising results in the long term by decreasing the rate of fat reabsorption. The permanence and stability of the graft in all the injected areas has showed that autologous fat grafts enriched with stem cells could be a promising technique for the correction of defects caused by this syndrome.