Abstract:
:Background: Classical MMA, caused by methylmalonyl-CoA mutase deficiency, may result in late-onset dysfunction in several organ systems. To date, 10 cases of optic neuropathy have been reported. The prevalence of optic neuropathy in visually asymptomatic patients has not been determined. This study sought to identify overt and subclinical optic neuropathy in a cohort with classical MMA. Methods and Materials: Neuroophthalmic examinations were performed on 21 patients identified with classical MMA, older than 10years. Diagnosis of optic neuropathy was determined by a combination of visual acuity, optic nerve appearance and electrodiagnostic tests. Tabulated data were analyzed for association of variables using SAS software. Significance was set at p < .05. Results: Two-thirds were Saudi nationals and one third, Syrian. Age range was 11-29years. Eleven (52.4%) patients had optic neuropathy. Nine (81.8%) of these were bilateral, seven (57.9% to 63.6%) reported decreased vision and four (33.1% to 36.4%) were asymptomatic. Two patients had catastrophic vision loss, following acute metabolic crises. Sixteen patients had chronic renal impairment while three had renal hypertension. Seventeen patients had short stature and eight, chronic pancreatitis. Methylmalonic acid levels ranged from 82 to 3,324µmol/L (Normal<1µmol/L). There was a significant association between optic neuropathy and female gender (p = .011) and none with age, nationality, renal impairment, pancreatitis or specific genotype. Conclusion: Optic neuropathy was a frequent finding in classical MMA. It was often bilateral and some cases were sub-clinical, lacking visual symptoms. These findings have important management implications. Full ophthalmic evaluations should be performed early and regularly in patients with MMA, even when patients are asymptomatic.
journal_name
Ophthalmic Genetjournal_title
Ophthalmic geneticsauthors
AlOwain M,Khalifa OA,Al Sahlawi Z,Hussein MH,Sulaiman RA,Al-Sayed M,Rahbeeni Z,Al-Hassnan Z,Al-Zaidan H,Nezzar H,Al Homoud I,Eldali A,Altonen B,Handoom BS,Mbekeani JNdoi
10.1080/13816810.2019.1634740subject
Has Abstractpub_date
2019-08-01 00:00:00pages
313-322issue
4eissn
1381-6810issn
1744-5094journal_volume
40pub_type
杂志文章abstract::The H402 allele of the CFH gene is an established risk factor for age-related maculopathy (ARMD) in Caucasians, accounting for approximately 60% of the genetic risk at the population level. In general, the advanced forms of ARMD are rare in Black populations in Africa, as well as Black populations who have lived for g...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810802216472
更新日期:2008-09-01 00:00:00
abstract::Fundal opacities have been reported in patients with Gaucher disease, a rare autosomal recessive lysosomal storage disease, prior to the advent of optical coherent tomography. This report provides a detailed analysis of the fundal opacities in a 14-year-old girl with genetically proven Gaucher disease using spectral d...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2012.716489
更新日期:2012-12-01 00:00:00
abstract::Background: Hydroxychloroquine retinal toxicity can occur in up to 7.5% of patients receiving treatment; however, possible genetic risk factors are poorly understood. The main objective of the study was to explore candidate genetic risk factors for retinal toxicity.Materials and Methods: Case-control study of patients...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2020.1747093
更新日期:2020-04-01 00:00:00
abstract:PURPOSE:Mutations in the gene encoding rhodopsin, the visual pigment in rod photoreceptors, were shown to be the most common cause of autosomal retinitis pigmentosa (RP). In order to determine the prevalence of rhodopsin alterations in southern French populations, we examined 52 unrelated patients/families with autosom...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1076/opge.20.3.173.2282
更新日期:1999-09-01 00:00:00
abstract::A three-generation family presenting with ocular developmental abnormalities, including anterior segment dysgenesis and coloboma, associated with brachydactyly and clinodactyly is presented. Several conditions incorporating ocular and bony limb abnormalities have been described. However, we believe that this family ma...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810490902684
更新日期:2004-12-01 00:00:00
abstract:OBJECTIVES:Williams-Beuren Syndrome (WBS) is a multisystem disorder caused by the deletion of contiguous genes on chromosome 7q11.23. Ophthalmologic abnormalities and deficits in visual motor integration are important features of WBS. Here we describe our experience with Brazilian WBS patients and their ophthalmologic ...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2013.873941
更新日期:2015-01-01 00:00:00
abstract:BACKGROUND:Senior-Løken syndrome (SLS) is a rare autosomal recessive disease characterised by nephronophthisis and retinal degeneration, and belongs to a group of genetically heterogeneous disorders known as the ciliopathies. MATERIALS AND METHODS:Case report of a patient with genetically proven SLS presenting with h...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2020.1766086
更新日期:2020-08-01 00:00:00
abstract:OBJECTIVE:To characterize visual function in defined genotypes including siblings with Usher syndrome. METHODS:Thirteen patients with phenotypically different subtypes of Usher syndrome, including 3 families with affected siblings, were selected. Genetic analysis and ophthalmological examinations including visual fiel...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2010.536064
更新日期:2011-06-01 00:00:00
abstract::The identification by fundus examination of those females carrying an X-linked retinitis pigmentosa (RP) gene can reportedly be as high as 87%. In genetic counselling sessions with young females with a 50% risk of being a carrier who wished to know their status, it has not been possible to achieve such a level of succ...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816819509059970
更新日期:1995-09-01 00:00:00
abstract:BACKGROUND:A Chinese family with X-linked juvenile retinoschisis (XLRS) was identified. The purpose of this study was to identify genetic defects in this family and to investigate the visual function during the progression of the disease in the proband from childhood to adulthood. METHODS:The family history was collec...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2011.628359
更新日期:2012-06-01 00:00:00
abstract:PURPOSE:The study was undertaken to investigate whether anterior segment findings are different in children with Down syndrome (DS) to normal children and to focus on its clinical significance. METHODS:A cross-sectional case control study was conducted in a total of 38 children with DS and 42 healthy children. This is...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2013.789535
更新日期:2014-06-01 00:00:00
abstract:BACKGROUND:Mutation in eye developmental genes has been reported to cause anophthalmia and microphthalmia. However, in India, especially in the Western Indian population, such reports are scarce. Hence, the present study aims to investigate mutations in 15 ocular developmental genes in patients with anophthalmia and mi...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2018.1436184
更新日期:2018-06-01 00:00:00
abstract::We present six patients with typical Hallermann-Streiff syndrome. All have microphthalmia and were operated for congenital cataract. Three of the patients developed a severe glaucoma and one patient presented repeated uveal effusions. Five of our patients have the same pattern of corneal stromal opacities. The opaciti...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810802027101
更新日期:2008-06-01 00:00:00
abstract::Because mutations in the peripherin/RDS gene have been found in retinal dystrophies involving the macula, we examined various types of macular dystrophies from southern France to characterize sequence variations that may be associated with these conditions. DNA sequence analysis of the full coding and flanking regions...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816819709057126
更新日期:1997-09-01 00:00:00
abstract::Background Microcephaly and chorioretinopathy (MCCRP) is a rare neuro-ophthalmologic disorder that causes microcephaly and chorioretinopathy. In a recessive inheritance pattern, there are three types: MCCRP1; MCCRP2 and MCCRP3. MCCRP3 results from pathogenic variants in the tubulin-gamma complex-associated protein 4 (...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2020.1747084
更新日期:2020-04-01 00:00:00
abstract::A Swedish family with choroideremia and a deletion of the CHM gene has been studied with ophthalmological examination, full-field electroretinography, and DNA analysis in order to characterize the phenotype of the disease. Although all four patients studied had a complete deletion of the gene, they showed a considerab...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816819509057855
更新日期:1995-12-01 00:00:00
abstract::A 6-month-old boy presented with a congenital eye movement disorder consistent with congenital fibrosis of the extraocular muscles type 1 (CFEOM1). Mutational analysis confirmed the most common mutation in the CFEOM1 gene KIF21A. In addition to the typical findings in CFEOM1, distinctive conjunctival changes and small...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810802697473
更新日期:2009-06-01 00:00:00
abstract:PURPOSE:The age-related maculopathy susceptibility2 (ARMS2)/LOC387715 A69S (rs10490924) polymorphism and cigarette smoking have been shown to have significant association with AMD. In this meta-analysis we used the results of available association studies of combined ARMS2/LOC387715 genotypes and cigarette smoking with...
journal_title:Ophthalmic genetics
pub_type: 杂志文章,meta分析,评审
doi:10.1080/13816810.2016.1237664
更新日期:2017-07-01 00:00:00
abstract::Background: The present study aims to identify the underlying genetic defects in a Chinese family with autosomal dominant congenital cataracts (ADCC). Methods: Detailed family histories and clinical data were recorded. Targeted exome sequencing of 54 known cataract-associated genes combined with high-throughput next-g...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2020.1855665
更新日期:2020-12-04 00:00:00
abstract:PURPOSE:Genetic factors are shown to have a role in the development of primary open-angle glaucoma (POAG). The aim of this study was to determine the effects of genetic polymorphisms of Rho-kinase (ROCK) genes on the risk of POAG in a Turkish population. METHODS:Genomic DNA was extracted from leukocytes of the periphe...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2014.895016
更新日期:2016-01-01 00:00:00
abstract:BACKGROUND:Tuberous sclerosis complex (TSC) is an autosomal dominant genetic disorder characterized by benign hamartomas occurring in multiple organ systems including the brain, kidneys, heart, lungs, liver, skin, and the eyes. Typical retinal findings associated with TSC include astrocytic hamartoma and achromic patch...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2020.1755989
更新日期:2020-08-01 00:00:00
abstract:BACKGROUND:Age-related macular degeneration is the leading cause of blindness in elderly individuals in developed countries. The etiology and pathophysiology of age-related macular degeneration have not been elucidated yet. Knowing that the main pathological change of age-related macular degeneration is formation of dr...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2016.1242018
更新日期:2017-07-01 00:00:00
abstract::Usher syndrome has classically been described as a combination of hearing loss and rod-cone dystrophy; vestibular dysfunction is present in many patients. Three distinct clinical subtypes were documented in the late 1970s. Genotyping efforts have led to the identification of several genes associated with the disease. ...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2020.1747090
更新日期:2020-10-01 00:00:00
abstract:PURPOSE:To describe and compare ocular findings in patients with Hermansky-Pudlak syndrome (HPS) type 1 and 3. METHODS:This is a retrospective case series of 64 patients with HPS from 1999 to 2009 evaluated at an outpatient private ophthalmologic clinic. Patients underwent genetic analysis of selected albinism (Tyrosi...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2014.907920
更新日期:2016-01-01 00:00:00
abstract:PURPOSE:Retinoblastoma (Rb) tumor recurrence in the papillary or macular region is a threat to life and visual prognosis respectively, making early detection indispensable. This study demonstrates the value of optical coherence tomography (OCT) in the early detection of subclinical tumor recurrence. METHODS:Since June...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2018.1436183
更新日期:2018-06-01 00:00:00
abstract::Mutations in the peripherin/RDS gene have been identified in families with various retinopathies including those affecting primarily the macula and those restricted to the retinal periphery. Here, we describe the clinical findings of two sisters with late-onset central areolar choroidal dystrophy (CACD). The two sibli...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810600976822
更新日期:2006-12-01 00:00:00
abstract:BACKGROUND AND OBJECTIVES:The retinal features of Alport syndrome include a central and peripheral fleck retinopathy, temporal retinal thinning, and a macular hole. Here we describe further retinal abnormalities. METHODS:We identified a case of bull's eye maculopathy 20 years previously in a 68-year-old female, and re...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2016.1210648
更新日期:2017-05-01 00:00:00
abstract:PURPOSE:To present a boy with unilateral duplication of the eye. METHOD:The case history is described from the first visit at birth to the age of 14 years. RESULTS:A review of the literature shows that this malformation is compatible with life although malformations of the brain and epilepsy have been reported in all...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810701209479
更新日期:2007-06-01 00:00:00
abstract::Purpose: Congenital glaucoma (CG) results from poorly understood developmental abnormalities of the aqueous drainage structures and is clinically characterized by high intraocular pressure (IOP), epiphora, corneal oedema, photophobia, blepharospasm and ocular enlargement. To date, more than 50 pathogenic mutations in ...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2011.596891
更新日期:2011-08-04 00:00:00
abstract::The visual cycle is essential for vision and several genes encoding proteins of the cycle have been found mutated in various forms of inherited retinal dystrophy. We screened 3 genes of the visual cycle. RGR, encoding the retinal pigment epithelium (RPE) G protein-coupled receptor acting in vitro as a photoisomerase; ...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2010.512354
更新日期:2010-12-01 00:00:00