posterior embryotoxon

后胚毒素
  • 文章类型: Journal Article
    Axenfeld-Rieger syndrome (ARS) is a rare congenital disease that is primarily characterized by ocular anterior segment anomalies but is also associated with craniofacial, dental, cardiac, and neurologic abnormalities. Over half of cases are linked with autosomal dominant mutations in either FOXC1 or PITX2, which reflects the molecular role of these genes in regulating neural crest cell contributions to the eye, face, and heart. Within the eye, ARS is classically defined as the combination of posterior embryotoxon with iris bridging strands (Axenfeld anomaly) and iris hypoplasia causing corectopia and pseudopolycoria (Rieger anomaly). Glaucoma due to iridogoniodysgenesis is the main source of morbidity and is typically diagnosed during infancy or childhood in over half of affected individuals. Angle bypass surgery, such as glaucoma drainage devices and trabeculectomies, is often needed to obtain intraocular pressure control. A multi-disciplinary approach including glaucoma specialists and pediatric ophthalmologists produces optimal outcomes as vision is dependent on many factors including glaucoma, refractive error, amblyopia and strabismus. Further, since ophthalmologists often make the diagnosis, it is important to refer patients with ARS to other specialists including dentistry, cardiology, and neurology.
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  • 文章类型: Case Reports
    我们描述了Alagille综合征患者的眼部表现,包括通过超宽视野和前段光学相干断层扫描(AS-OCT)成像获得的那些。
    一名先前无症状的29岁女性,在JAG1基因中具有杂合致病变异,被转诊为眼科评估。眼部异常包括双侧后部胚胎毒素,虹膜萎缩,周围和乳头周围区域的视网膜色素变化,和视盘高度。超宽视野OCT显示双侧视网膜变薄,周围视网膜病变和视盘抬高区域的脉络膜高反射率增加。AS-OCT证实双侧虹膜萎缩。
    在本病例中观察到的眼部异常代表Alagille综合征的临床特征。超宽视野和AS-OCT均可用于评估Alagille综合征的眼部异常。
    UNASSIGNED: We describe the ocular findings in a patient with Alagille syndrome, included those obtained with ultra-widefield and anterior-segment optical coherence tomography (AS-OCT) imaging.
    UNASSIGNED: A previously asymptomatic 29-year-old woman with a heterozygous pathogenic variant in the JAG1 gene was referred for an ophthalmic evaluation. The ocular abnormalities included bilateral posterior embryotoxon, iris atrophy, retinal pigmentary changes in the peripheral and peripapillary regions, and optic disc elevation. Ultra-widefield OCT showed bilateral retinal thinning with increased choroidal hyperreflectivity in the areas of peripheral retinopathy and optic disc elevation. AS-OCT confirmed bilateral iris atrophy.
    UNASSIGNED: The ocular abnormalities observed in the present case represent clinical features characteristic of Alagille syndrome. Both ultra-widefield and AS-OCT were useful for assessing the ocular abnormalities in Alagille syndrome.
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  • 文章类型: Case Reports
    BACKGROUND: Axenfeld-Rieger syndrome (ARS) is a rare autosomal dominant eye disorder that can also affect other organs of the human body. The condition is primarily characterized by the anterior segmental abnormalities of the eye. Here, we present an observational case series of a three-generation family with ARS and unexpected foveal anomaly.
    METHODS: A 33-year-old woman was admitted to an Ophthalmology Clinic in Bialystok for left eye congenital cataract surgery. The patient (proband) was diagnosed with visual deterioration, multiple defects of iris, corectopia, displacement of the Schwalbe\'s line, and phenotypic characteristics of ARS. A perimetric examination indicated peripheral visual field loss and signs typical for glaucoma. Based on the phenotypic symptoms and genetic test, the patient was diagnosed with Axenfeld Rieger Syndrome. However, the optical coherence tomography of the macula showed foveal anomaly (absence of the physiological pit), which is not typically associated with this genetic disorder. The patient\'s family history revealed that her two daughters were undergoing treatment for congenital glaucoma, and one of the daughters also had foveal anomaly the same as her mother. Interestingly, an examination of the patient\'s mother showed typical phenotypic features of ARS such as a defect of the iris, posterior embryotoxon, and coloboma, as well as foveal anomaly. A genetic test confirmed PITX2 mutation in both, proband\'s two daughters and mother.
    CONCLUSIONS: This study highlights the occurrence of ARS with unusual ophthalmic features such as foveal anomaly (absence of the physiological pit) in a three-generation family. Although ARS is known to represent the developmental defects of the anterior segment of the eye, it is very important to perform fundus evaluation to identify associated posterior segment anomalies that may affect visual acuity. The presence of ocular defects not typically associated with ARS suggests a wide spectrum of mutations within PITX2 gene which are required to identify in order to determine genotype- phenotype correlation in ARS affected individuals.
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  • 文章类型: Case Reports
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  • 文章类型: Journal Article
    Alagille综合征(ALGS)是一种常染色体显性疾病,在多系统参与下,这通常是由于Notch信号通路缺陷而发生的,主要是由于JAG1突变(ALGS1型),但很少由于神经源性位点缺口同源蛋白(NOTCH2)突变(ALGS2型)。在五个主要临床标准中至少有三个的病例中怀疑:胆汁淤积伴胆管稀少,先天性心脏缺陷,眼后胚胎毒素,典型的面部特征,和骨骼畸形.直到日期,在ALGS中没有发现肝脏结局的早期预测标志物。没有基因型或,表型特征或相关性可以预测终末期肝病的发展,这带来了独特的管理挑战。进行性肝损害的病例,持续的胆汁淤积和顽固性瘙痒通常依靠肝移植作为最后手段。心脏,为了更好的移植后结果,在肝移植前应充分了解肾脏状态。大多数临床表现通常改善以下移植,除了身材的任何变化。肝移植后的结果通常与其他需要肝移植作为最后手段的情况相当。但是在这种疾病中,迄今为止,长期免疫抑制对其他受影响系统的影响尚未得到很好的评估。因此,需要长期的移植后前瞻性研究来解决这些问题。如何引用这篇文章:SinghSP,帕蒂GK.Alagille综合征和肝脏:当前见解。欧亚J肝胃肠,2018;8(2):140–147。
    Alagille syndrome (ALGS) is an autosomal dominant disorder, with multisystem involvement, which usually occurs due to Notch signaling pathway defects, mostly due to JAG1 mutation (ALGS type 1), but rarely due to neurogenic locus notch homolog protein (NOTCH2) mutation (ALGS type 2). It was suspected in cases having at least three out of five major clinical criteria: cholestasis with a paucity of the bile duct, congenital cardiac defects, ocular posterior embryotoxon, typical facial features, and skeletal malformation. Till date, no early predictive marker for hepatic outcome in ALGS has found. No genotypic or, phenotype features or correlation could predict the development of endstage liver disease, which poses a unique management challenge. Cases with progressive liver damage, unremitting cholestasis and intractable pruritus often depend on liver transplantation as last resort. The cardiac, and renal status should be well accessed before liver transplant for the better post-transplantation outcome. Most of the clinical manifestations usually improve the following transplant, except any change in stature. The post liver transplantation outcome was usually comparable with other conditions which require liver transplantation as a last resort, but in this disease the effect of long term immunosuppression on other affected systems not evaluated well till date. Therefore long term post transplant prospective study is required to address these issues. How to cite this article: Singh SP, Pati GK. Alagille Syndrome and the Liver: Current Insights. Euroasian J Hepatogastroenterol, 2018;8(2):140-147.
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  • 文章类型: Journal Article
    OBJECTIVE: Neonatal cholestasis can be associated with ocular findings that might aid in its diagnosis, e.g., Alagille syndrome (AGS) and Niemann Pick disease (NPD). We aimed to investigate the frequency of ocular manifestations in infants with cholestasis.
    METHODS: This cross-sectional study included cholestatic infants presenting to the Paediatric Hepatology Unit, Cairo University Paediatric Hospital, Cairo, Egypt. All infants underwent examination of lid, ocular motility, anterior and posterior segments and measurement of intraocular pressure, cycloplegic refraction, ocular ultrasonography and vision.
    RESULTS: The study included 112 infants with various cholestasis; 73 (65.2%) were males. The median age was 2months. Diagnosis was reached in 39 cases: 14 had AGS, 14 had biliary atresia (BA), 4 had NPD, 4 had post-haemolytic cholestasis, 2 had cytomegalovirus neonatal hepatitis, and one case had hepatorenal tyrosinaemia. Thirteen cases were probably having progressive familiar intrahepatic cholestasis (PFIC) type 1 or 2 considering their persistent cholestasis in the presence of normal gamma-glutamyl transpeptidase; 28 were left with a diagnosis of \"idiopathic neonatal hepatitis\" (INH), and 32 (28.6%) had no definite diagnosis. Ophthalmologic abnormalities were found in 39 cases (34.8%). The commonest finding was unilateral/bilateral optic nerve drusen in 12 (10.7%), followed by posterior embryotoxon in 11 (9.8%). Ocular findings were observed in 64.3% patients with AGS, 50% patients with NPD, 30.8% cases with suspected PFIC type 1or 2, 28.6% infants with INH, and 14.3% patients with BA.
    CONCLUSIONS: Ophthalmologic findings are not uncommon among cholestatic infants. Ophthalmologic examination should be routinely performed, including assessment of anterior segment, fundus examination, and ocular ultrasound.
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  • 文章类型: Case Reports
    背景:Alagille综合征,一种罕见的常染色体显性遗传疾病,表现有五个主要特征:小叶间胆管的缺乏,特征相,后胚毒素,椎体缺损,和周围性肺动脉狭窄。全球范围内,到目前为止只报告了500例,印度次大陆只报告了5例病例.很少,Alagille综合征还表现为皮肤表现和早发性慢性肝病,在我们的案子里找到的.我们相信我们报告了可能是第一例Alagille综合征,表现为咖啡黑斑,因为在文献中找不到此类已发表的病例报告。
    方法:我们报告了一例罕见的儿童胆汁淤积性黄疸,并伴有新生儿黄疸。来自印度次大陆的10岁男孩从婴儿期开始出现阻塞性黄疸。他的上肢骨头也有反复骨折,他鼻子间歇性出血,生产性咳嗽,夜视下降,他皮肤上的色素沉着斑点,他的腹部逐渐增大.肝活检标本的组织学检查显示胆管很少,并提示慢性肝病。我们的患者被诊断为Alagille综合征,并保守治疗,但在最终诊断后1年死亡。
    结论:迄今为止,印度文献中很少报道这种特殊的胆管疾病缺乏综合征形式。我们的案例值得注意,因为孩子有咖啡斑和慢性肝病的早期发作,这在Alagille综合征中很罕见.我们认为这是关于Alagille综合征的首例病例报告,表现为caféaulait综合征和这种慢性肝病的早期发作。
    BACKGROUND: Alagille syndrome, a rare genetic disorder with autosomal dominant transmission, manifests with five major features: paucity of interlobular bile ducts, characteristic facies, posterior embryotoxon, vertebral defects, and peripheral pulmonary stenosis. Globally, only 500 cases have so far been reported, with only five cases reported in the Indian subcontinent. Rarely, Alagille syndrome also presents with skin manifestations and early-onset chronic liver disease, which was found in our case. We believe that we report what could be the first case of Alagille syndrome presenting with café au lait spots, as no such published case report could be found in the literature.
    METHODS: We report an unusual case of childhood cholestatic jaundice with neonatal onset of jaundice. A 10-year-old boy from the Indian subcontinent presented with obstructive jaundice from early infancy. He also had recurrent fractures of his upper limb bones, intermittent bleeding from his nose, productive cough, decreased night vision, hyperpigmented spots over his skin, and progressive enlargement of his abdomen. Histological examination of a liver biopsy specimen revealed a paucity of bile ducts and changes suggestive of chronic liver disease. Our patient was diagnosed with Alagille syndrome and managed conservatively but died 1 year after the final diagnosis.
    CONCLUSIONS: This particular syndromic form of paucity of bile duct disorder has been rarely reported in the Indian literature so far. Our case is notable because the child had café au lait spots and very early onset of chronic liver disease, which is quite rare in Alagille syndrome. We believe this to be the first case report on Alagille syndrome manifesting with café au lait syndrome and such early onset of chronic liver disease.
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  • 文章类型: Journal Article
    OBJECTIVE: To determine the prevalence of posterior embryotoxon, corneal opacity, pigment on endothelium, corneal dystrophy, and corneal vascularization in a middle-aged Iranian population, and their association with age and sex.
    METHODS: In a cross-sectional study with multistage cluster sampling, subjects were chosen from 40 to 64-year-old residents of Shahroud in northern Iran. Participants had ophthalmic examinations before and after pupil dilation. Corneal abnormalities were diagnosed by an ophthalmologist using a slit lamp.
    RESULTS: Of the 6311 invitees, 5190 people (82.2%) participated; 58.6% (n=3040) were female. The prevalence of posterior embryotoxon, corneal opacity, and pigment on endothelium were 14.7% (95% CI: 13.4-16.0), 4.1% (95% CI: 3.4-4.7) and 1.2% (95% CI: 0.9-1.5), respectively, and corneal dystrophy and corneal vascularization were seen in 0.3% (95% CI: 0.2-0.5) and 3.7% (95% CI: 3.0-4.3), respectively. Unlike posterior embryotoxon, the prevalence of all studied abnormalities increased with age after adjusting for sex. The prevalence of posterior embryotoxon (p=0.023) and corneal dystrophy (p=0.038) was significantly higher in women, and the prevalence of corneal opacity (p<0.001) was significantly higher in men. After adjusting for age, sex, and cataract, cases with corneal opacity and corneal vascularization demonstrated significantly worse uncorrected and corrected visual acuity (p<0.001).
    CONCLUSIONS: This report is the first to explore the prevalence of a variety of corneal conditions in a Middle-Eastern population. The findings indicate that one out of five people may have some sort of corneal conditions, and some can impact corrected visual acuity.
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