Abstract:
:Anophthalmia and microphthalmia describe, respectively, the absence of an eye and the presence of a small eye within the orbit. The combined birth prevalence of these conditions is up to 30 per 100,000 population, with microphthalmia reported in up to 11% of blind children. High-resolution cranial imaging, post-mortem examination and genetic studies suggest that these conditions represent a phenotypic continuum. Both anophthalmia and microphthalmia may occur in isolation or as part of a syndrome, as in one-third of cases. Anophthalmia/microphthalmia have complex aetiology with chromosomal, monogenic and environmental causes identified. Chromosomal duplications, deletions and translocations are implicated. Of monogenic causes only SOX2 has been identified as a major causative gene. Other linked genes include PAX6, OTX2, CHX10 and RAX. SOX2 and PAX6 mutations may act through causing lens induction failure. FOXE3 mutations, associated with lens agenesis, have been observed in a few microphthalmic patients. OTX2, CHX10 and RAX have retinal expression and may result in anophthalmia/microphthalmia through failure of retinal differentiation. Environmental factors also play a contributory role. The strongest evidence appears to be with gestational-acquired infections, but may also include maternal vitamin A deficiency, exposure to X-rays, solvent misuse and thalidomide exposure. Diagnosis can be made pre- and post-natally using a combination of clinical features, imaging (ultrasonography and CT/MR scanning) and genetic analysis. Genetic counselling can be challenging due to the extensive range of genes responsible and wide variation in phenotypic expression. Appropriate counselling is indicated if the mode of inheritance can be identified. Differential diagnoses include cryptophthalmos, cyclopia and synophthalmia, and congenital cystic eye. Patients are often managed within multi-disciplinary teams consisting of ophthalmologists, paediatricians and/or clinical geneticists, especially for syndromic cases. Treatment is directed towards maximising existing vision and improving cosmesis through simultaneous stimulation of both soft tissue and bony orbital growth. Mild to moderate microphthalmia is managed conservatively with conformers. Severe microphthalmia and anophthalmia rely upon additional remodelling strategies of endo-orbital volume replacement (with implants, expanders and dermis-fat grafts) and soft tissue reconstruction. The potential for visual development in microphthalmic patients is dependent upon retinal development and other ocular characteristics.
journal_name
Orphanet J Rare Disjournal_title
Orphanet journal of rare diseasesauthors
Verma AS,Fitzpatrick DRdoi
10.1186/1750-1172-2-47subject
Has Abstractpub_date
2007-11-26 00:00:00pages
47issn
1750-1172pii
1750-1172-2-47journal_volume
2pub_type
杂志文章,评审abstract:BACKGROUND:Skin neurofibromas represent one of the main clinical manifestations of neurofibromatosis 1, and their number varies greatly between individuals. Quantifying their number is an important step in the methodology of many clinical studies, but counting neurofibromas one by one in individuals with thousands of t...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-014-0202-9
更新日期:2014-12-05 00:00:00
abstract:BACKGROUND:Imerslund-Gräsbeck syndrome (IGS) was described just over 50 years ago by Olga Imerslund and Ralph Gräsbeck and colleagues. IGS is caused by specific malabsorption of cobalamin (Cbl) due to bi-allelic mutations in either the cubilin gene (CUBN) or the human amnionless homolog (AMN). Mutations in the two gene...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/1750-1172-6-74
更新日期:2011-11-13 00:00:00
abstract::Xeroderma pigmentosum-Cockayne syndrome complex is a very rare multisystem degenerative disorder (Orpha: 220295; OMIM: 278730, 278760, 278780, 610651). Published information on XP-CS is mostly scattered throughout the literature. We compiled statistics related to symptom prevalence in XP-CS and have written a clinical...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章,评审
doi:10.1186/s13023-017-0616-2
更新日期:2017-04-04 00:00:00
abstract:BACKGROUND:Rare diseases (RDs) are often neglected because they affect a small percentage of the population (6-8 %), which makes research and development of new therapies challenging processes. Easy access to high-quality samples and associated clinical data is therefore a key prerequisite for biomedical research. In t...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-016-0527-7
更新日期:2016-10-24 00:00:00
abstract:BACKGROUND:The objective of this study was to assess the potential impact of the implementation of multiple-criteria decision analysis (MCDA) on the Polish pricing and reimbursement (P&R) process with regard to orphan drugs. METHODS:A four step approach was designed. Firstly, a systematic literature review was conduct...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-016-0388-0
更新日期:2016-03-10 00:00:00
abstract:BACKGROUND:Chronic obstructive pulmonary disease (COPD) is influenced by environmental and genetic factors. An important fraction of COPD cases harbor a major genetic determinant, inherited ZZ (Glu342Lys) α1-antitrypsin deficiency (AATD). A study was undertaken to investigate gene expression patterns in end-stage COPD ...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/1750-1172-7-29
更新日期:2012-05-23 00:00:00
abstract::The practice of genomic medicine stands to revolutionize our approach to medical care, and to realize this goal will require discovery of the relationship between rare variation at each of the ~ 20,000 protein-coding genes and their consequent impact on individual health and expression of Mendelian disease. The step-w...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章,评审
doi:10.1186/s13023-019-1127-0
更新日期:2019-06-24 00:00:00
abstract:BACKGROUND:Infants presenting with lysosomal acid lipase deficiency have marked failure to thrive, diarrhea, massive hepatosplenomegaly, anemia, rapidly progressive liver disease, and death typically in the first 6 months of life; the only available potential treatment has been hematopoietic stem cell transplantation, ...
journal_title:Orphanet journal of rare diseases
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1186/s13023-017-0587-3
更新日期:2017-02-08 00:00:00
abstract::Cerebrotendinous xanthomatosis (CTX) OMIM#213700 is a rare autosomal-recessive lipid storage disease caused by mutations in the CYP27A1 gene; this gene codes for the mitochondrial enzyme sterol 27-hydroxylase, which is involved in bile acid synthesis. The CYP27A1 gene is located on chromosome 2q33-qter and contains ni...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章,评审
doi:10.1186/s13023-014-0179-4
更新日期:2014-11-26 00:00:00
abstract:BACKGROUND:The vision loss in Leber hereditary optic neuropathy patients is due to mitochondrial DNA mutations. No treatment has shown a clear-cut benefit on a clinically meaningful end-point. However, clinical evidences suggest two therapeutic approaches: the reduction of the mutation load in heteroplasmic patients or...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-019-1128-z
更新日期:2019-06-21 00:00:00
abstract::Biliary atresia (BA) is a rare disease characterised by a biliary obstruction of unknown origin that presents in the neonatal period. It is the most frequent surgical cause of cholestatic jaundice in this age group. BA occurs in approximately 1/18,000 live births in Western Europe. In the world, the reported incidence...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章,评审
doi:10.1186/1750-1172-1-28
更新日期:2006-07-26 00:00:00
abstract:BACKGROUND:Idiopathic pulmonary hemosiderosis (IPH) is a rare cause of alveolar hemorrhage in children and its pathophysiology remains obscure. Classically, diagnosis is based on a triad including hemoptysis, diffuse parenchymal infiltrates on chest X-rays, and iron-deficiency anemia. We present the French pediatric co...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/1750-1172-8-161
更新日期:2013-10-14 00:00:00
abstract:BACKGROUND:PWS is a severe neurodevelopmental genetic disorder now usually diagnosed in the neonatal period from hypotonia and feeding difficulties. Our study analyzed the birth incidence and care of infants with early diagnosis. METHODS:Data were collected on 61 infants with a molecular diagnosis of PWS born in 2012 ...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-017-0673-6
更新日期:2017-06-28 00:00:00
abstract::Syndromic diarrhea (SD), also known as phenotypic diarrhea (PD) or tricho-hepato-enteric syndrome (THE), is a congenital enteropathy presenting with early-onset of severe diarrhea requiring parenteral nutrition (PN). To date, no epidemiological data are available. The estimated prevalence is approximately 1/300,000-40...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章,评审
doi:10.1186/1750-1172-3-6
更新日期:2008-02-28 00:00:00
abstract:BACKGROUND:The lysosomal storage disorder, Niemann Pick type C1 (NPC1), presents a variable phenotype including neurovisceral and neurological symptoms. 2-Hydroxypropyl-ß-cyclodextrin (HPßCD)-based therapies are presently the most promising route of intervention. While severe cerebellar dysfunction remains the main dis...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-015-0348-0
更新日期:2015-10-12 00:00:00
abstract:BACKGROUND:X-linked hypophosphataemia (XLH) is a rare, hereditary, progressive and lifelong phosphate wasting disorder characterised by pathological elevations in fibroblast growth factor (FGF) 23 concentration and activity; XLH has an incidence of approximately 1 in 20-25,000 individuals. Excess FGF23 activity leads t...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-020-01434-4
更新日期:2020-06-30 00:00:00
abstract::Hereditary Hemorrhagic Telangiectasia (HHT), also known as Rendu-Osler syndrome, is a genetic vascular disorder affecting 1 in 5000-8000 individuals worldwide. This rare disease is characterized by various vascular defects including epistaxis, blood vessel dilations (telangiectasia) and arteriovenous malformations (AV...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章,评审
doi:10.1186/s13023-019-1281-4
更新日期:2020-01-07 00:00:00
abstract:BACKGROUND:We report a 6.5 year-old female with a homozygous missense mutation in ZFYVE20, encoding Rabenosyn-5 (Rbsn-5), a highly conserved multi-domain protein implicated in receptor-mediated endocytosis. The clinical presentation includes intractable seizures, developmental delay, microcephaly, dysostosis, osteopeni...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-014-0141-5
更新日期:2014-09-20 00:00:00
abstract:BACKGROUND:Myotonic dystrophy type 1 (Steinert's disease or DM1), the most common form of autosomal dominant muscular dystrophy in adults, is a multisystem disorder, affecting skeletal muscle as well as eyes, heart, gastrointestinal tract, endocrine system, and central nervous system, finally responsible of increasing ...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-016-0417-z
更新日期:2016-04-04 00:00:00
abstract::The European Union Committee of Experts on Rare Diseases was entrusted with aiding the European Commission in a number of tasks, ranging from the monitoring of initiatives, to recommending improvements and actions to be pursued in the future, in addition to helping strengthen liaison at both European and International...
journal_title:Orphanet journal of rare diseases
pub_type: 社论
doi:10.1186/1750-1172-9-30
更新日期:2014-02-28 00:00:00
abstract::Arrhythmogenic cardiomyopathy (AC) is a heart muscle disease clinically characterized by life-threatening ventricular arrhythmias and pathologically by an acquired and progressive dystrophy of the ventricular myocardium with fibro-fatty replacement. Due to an estimated prevalence of 1:2000-1:5000, AC is listed among r...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章,评审
doi:10.1186/s13023-016-0407-1
更新日期:2016-04-02 00:00:00
abstract::Since its enactment in 2000, the European Orphan Medicinal Products Regulation has allowed the review and approval of approaching 70 treatments for some 55 different conditions in Europe. Success does not come without a price, however. Many of these so-called "orphan drugs" have higher price points than treatments for...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/1750-1172-7-74
更新日期:2012-09-26 00:00:00
abstract:BACKGROUND:It is unknown whether the neonatal tetrahydrobiopterin (BH4) loading test is adequate to diagnose long-term BH4 responsiveness in PKU. Therefore we compared the predictive value of the neonatal (test I) versus the 48-h BH4 loading test (test II) and long-term BH4 responsiveness. METHODS:Data on test I (>199...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-016-0394-2
更新日期:2016-01-29 00:00:00
abstract:BACKGROUND:Currently, clinical trials for new therapeutic strategies are being planned for Duchenne and Becker muscular dystrophies (DMD/BMD). However, it is difficult to obtain adequate numbers of patients in clinical trials. As solutions to these problems, patient registries are an important resource worldwide, espec...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/1750-1172-8-60
更新日期:2013-04-19 00:00:00
abstract:BACKGROUND:This study was conducted to identify potential biomarkers that could be used to evaluate disease progression and monitor responses to enzyme replacement therapy (ERT) in patients with mucopolysaccharidosis (MPS) IVA. METHODS:Levels of 88 candidate biomarkers were compared in plasma samples from 50 healthy c...
journal_title:Orphanet journal of rare diseases
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1186/1750-1172-6-84
更新日期:2011-12-16 00:00:00
abstract:BACKGROUND:Alpha-1 antitrypsin deficiency (AATD) is a rare hereditary condition that leads to decreased circulating alpha-1 antitrypsin (AAT) levels, significantly increasing the risk of serious lung and/or liver disease in children and adults, in which some aspects remain unresolved. METHODS:In this review, we summar...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章,评审
doi:10.1186/s13023-018-0856-9
更新日期:2018-07-11 00:00:00
abstract:BACKGROUND:The concept of individual burden, associated with disease, has been introduced recently to determine the "disability" caused by the pathology in the broadest sense of the word (psychological, social, economic, physical). Inherited ichthyosis belong to a large heterogeneous group of Mendelian Disorders of Cor...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/1750-1172-8-28
更新日期:2013-02-15 00:00:00
abstract:BACKGROUND:Treatment of phenylketonuria (PKU) with sapropterin dihydrochloride in responsive patients from an early age can have many advantages for the patient over dietary restriction alone. Accordingly, approval of sapropterin in the European Union was extended in 2015 to include patients aged 0-4 years, bringing th...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-018-0911-6
更新日期:2018-09-29 00:00:00
abstract::Warburg micro syndrome (WARBM) is a genetic heterogeneous disease characterized by microcephaly, intellectual disability, brain, ocular, and endocrine anomalies. WARBM1-4 can be caused by biallelic mutations of the RAB3GAP1 (RAB3 GTPase-activating protein 1), RAB3GAP2, RAB18 (RAS-associated protein RAB18), or TBC1D20 ...
journal_title:Orphanet journal of rare diseases
pub_type: 信件
doi:10.1186/s13023-014-0113-9
更新日期:2014-10-21 00:00:00
abstract:BACKGROUND:Prader-Willi syndrome (PWS) is often related to severe obesity and type-2 diabetes mellitus (T2DM). However, few studies, and none in Korea, have examined prevalence of T2DM and other variables in PWS. The aim of this study was to identify the prevalence and associated risk factors for T2DM in Korean patient...
journal_title:Orphanet journal of rare diseases
pub_type: 杂志文章
doi:10.1186/s13023-017-0702-5
更新日期:2017-08-30 00:00:00