Retinal Hamartoma in Oral-Facial-Digital Syndrome

Total Page:16

File Type:pdf, Size:1020Kb

Retinal Hamartoma in Oral-Facial-Digital Syndrome CLINICOPATHOLOGIC REPORT Retinal Hamartoma in Oral-Facial-Digital Syndrome Patricia S. Tsai, BS; Joan M. O’Brien, MD nly recently have intraocular findings been described in oral-facial-digital syndrome (OFDS), including 5 cases of chorioretinal colobomas and 1 case of optic nerve colo- boma. We report a case of a new ocular anomaly associated with this syndrome: a retinal hamartoma in a male infant with OFDS. The patient had bilateral retinal masses Othat were suspicious for retinoblastoma because of a family history of retinoblastoma. Physical ex- amination and imaging studies of the retinal masses could not differentiate between retinoblas- toma, hamartoma, or persistent hyperplastic primary vitreous. Subsequent pathologic study of an enucleated globe was diagnostic of a retinal hamartoma. This case further illustrates the hetero- geneity of ocular anomalies in OFDS and underscores the importance of a complete ophthalmo- logic evaluation in patients with this syndrome. Arch Ophthalmol. 1999;117:963-965 Oral-facial-digital syndrome (OFDS) de- mother with a history of unilateral reti- scribes a group of syndromes character- noblastoma who was otherwise pheno- ized by congenital anomalies of the oral typically normal. Both the parents and the cavity (cleft palate, tongue hamartomas, paternal grandparents were first cousins. bifid tongue, multiple hyperplastic Pregnancy was without complication, and frenula), face (hypoplastic nasal carti- the infant was delivered at 39 weeks’ ges- lage), and digits (syndactyly, polydac- tation. The infant was initially mildly hy- tyly, brachydactyly, clinodactyly). Oph- potonic but quickly improved. Physical thalmologic findings that have been examination and subsequent genetic evalu- reported in OFDS include hypertelorism, ation revealed multiple congenital anoma- strabismus, and seesaw winking.1 Only re- lies consistent with OFDS, including mul- cently have intraocular findings been re- tiple tongue hamartomas, corrugated ported, including 5 cases of chorioretinal gingiva, short flat bridge of nose, and bi- colobomas and 1 case of optic nerve colo- lateral polydactyly of the hands and feet boma.2-6 However, ocular findings in most (Figure 1, Figure 2, and Figure 3). cases of OFDS have not been well docu- Other considerations included in the dif- mented, and ocular manifestations of ferential diagnosis were retinoblastoma, OFDS are still not well described in the persistent hyperplastic primary vitreous, ophthalmologic literature. Here we re- and Norrie’s disease. port a case of an ocular finding not pre- Ophthalmologic examination was viously described in OFDS, a case of an in- performed at the University of Califor- fant with OFDS and a family history of nia, San Francisco, when the infant was retinoblastoma who was originally seen 10 days old. The infant exhibited hyper- with bilateral retinal masses. telorism and bilateral blepharophimosis. It could not be determined whether he had REPORT OF A CASE any useful vision. The iris was dysmor- phic with irregular borders in both eyes. A full-term male infant was referred to us Also in both eyes was a retinal yellow- because of suspected bilateral retinoblas- white mass with overlying hemorrhage. No toma. This was the first pregnancy of a evidence of normal retinal vasculature was associated with the masses. Ultrasonog- From the Department of Ophthalmology, University of California, San Francisco. raphy demonstrated a solid mass without ARCH OPHTHALMOL / VOL 117, JULY 1999 963 ©1999 American Medical Association. All rights reserved. Downloaded From: https://jamanetwork.com/ on 10/01/2021 intrinsic calcification. A computed or calcify, enucleation of the worse Corneal diameters were also in- tomographic scan of the orbits eye would be performed for treat- creased bilaterally: 11.5 mm verti- showed bilateral intraocular masses ment and diagnosis. cally and 11.0 mm horizontally in without the calcifications typical of At 2 months of age, a com- the right eye, and 9.0 mm vertically retinoblastoma. The scan also re- puted tomographic scan of the or- and 9.0 mm horizontally in the left vealed small optic nerves bilater- bit demonstrated no further growth eye. Medical treatment of the glau- ally. It could not be determined of the masses but did indicate new coma was instituted. Enucleation of whether the masses represented reti- calcification in the right eye, con- the right eye with placement of a noblastoma, hamartomas, or some sistent with the diagnosis of retino- prosthesis was performed without variant of persistent hyperplastic pri- blastoma. At the time of enucle- complication. mary vitreous. It was the recommen- ation, the infant exhibited no fixation Pathologic examination of the dation of the Pediatric Tumor Board, or following behavior. Ophthalmic enucleated right eye revealed a to- University of California, San Fran- examination revealed a completely tal retinal detachment in a funnel cisco, to maintain close observa- flat anterior chamber in the right eye configuration with eosinophilic exu- tion with eye examinations per- and a formed chamber with some date filling the subretinal space. The formed under anesthesia every few synechiae in the left eye. Pneumo- retinal layers were disorganized with weeks. If the retinal masses did not tonometry showed elevated pres- areas of dysplasia (Figure 4 and change, observation would con- sures bilaterally, with 28 to 29 Figure 5). These findings were con- tinue; if the masses began to grow mm Hg OD and 24 to 25 mm Hg OS. sistent with a retinal hamartoma. In Figure 1. Patient’s lips and tongue with multiple hamartomas at the distal end of the tongue. Figure 4. Dysplastic retina with disorganization of normal retinal layers and no evidence of neoplasia (hematoxylin-eosin, original magnification 340). Figure 2. Evidence of polydactyly. The patient has 6 fingers on each hand. Figure 3. Patient’s left foot with 6 toes (the right foot also has 6 toes). Figure 5. Higher-power view of dysplastic retina (hematoxylin-eosin, original magnification 3100). ARCH OPHTHALMOL / VOL 117, JULY 1999 964 ©1999 American Medical Association. All rights reserved. Downloaded From: https://jamanetwork.com/ on 10/01/2021 IX has been the only type associ- To our knowledge, this article ated with intraocular findings. How- reports the first case of OFDS asso- ever, it is unclear whether com- ciated with retinal hamartoma. Be- plete ophthalmologic examinations cause of many prior reported cases were performed on the early re- of ocular anomalies associated with ported cases of OFDS; intraocular OFDS, it is likely that our patient’s anomalies therefore cannot be ex- ocular anomalies are related to his cluded in other types of OFDS. Our OFDS rather than being just coin- patient has findings most consis- cidental findings. This case further tent with OFDS type IX. To date, illustrates the heterogeneity of ocu- only 6 prior cases of OFDS type IX lar anomalies in OFDS and under- have been reported, including 5 scores the importance of a com- Figure 6. Fundus photograph of posterior pole cases of chorioretinal colobomas and plete ophthalmologic evaluation in in the left eye, taken through the central 1 case of optic nerve coloboma. To patients with this syndrome. cataractous lens, demonstrates a central our knowledge, retinal masses, such yellow-white mass possibly consistent with persistent hypoplastic primary vitreous. as the ones in our patient, have never Accepted for publication December 26, been reported in OFDS. 1998. Because of the lack of prece- We are grateful to Sharon addition, pathologic studies also dent, it was uncertain initially if our Wheeler for her editorial comments. demonstrated an iris in apposition patient’s bilateral retinal masses were Reprints: Joan M. O’Brien, MD, to the corneal endothelium produc- hamartomas and if this type of ham- Department of Ophthalmology, Uni- ing apposition angle closure. The op- artoma was even consistent with versity of California, San Francisco, tic nerve was atrophic with no evi- OFDS. Because our patient’s mother 10 Kirkham St, Box 0730, San Fran- dence of neoplastic invasion. No had a history of unilateral retino- cisco, CA 94143-0730. calcification or retinoblastoma was blastoma, the possibility that the reti- seen. nal masses were retinoblastoma was REFERENCES Cytogenetic testing revealed also very likely. Patients with uni- normal chromosomes by G-band lateral retinoblastoma have a re- analysis. ported 15% risk of germline muta- 1. Toriello HV. Heterogeneity and variability in the oral-facial-digital syndromes. Am J Med Genet. tion. Ophthalmologic examination 1988;4(suppl):149-159. COMMENT and imaging studies also raised the 2. Gurrieri F, Sammito V, Ricci B, Iossa M, Bellussi possibility of persistent hyperplas- A, Neri G. Possible new type of oral-facial-digital Oral-facial-digital syndrome was first tic primary vitreous and Norrie’s dis- syndrome with retinal abnormalities: OFDS type described by Papillon-League and ease. Because the right retinal mass (VIII). Am J Med Genet. 1992;42:789-792. 3. Jamieson R, Collins F. Oral-facial-digital syn- Psaume in 1954, and since then, up later developed some calcification, drome and retinal abnormalities with autosomal to 9 distinct types of OFDS have which was most consistent with a recessive inheritance. Am J Med Genet. 1993;47: been described. Ocular findings that diagnosis of retinoblastoma, enucle- 304-306. have been described include hyper- ation of the right eye was per- 4. Stevens JL, Marsh JL. Ocular anomalies in the oral- telorism in types I, II, III, IV, and VI; formed. Only after pathologic eval- facial-digital syndrome. J Pediatr Ophthalmol Stra- bismus. 1994;31:397-398. strabismus in I, II, and IV; and see- uation of the globe was the final 5. Nevin NC, Silvestri J, Kernohan DC, Hutchinson 1 saw winking in type IV. Recently, diagnosis of hamartoma deter- WM. Oral-facial-digital syndrome with retinal ab- a new type (originally described as mined. However, the appearance of normalities, OFDS type IX: a further case report. type VIII, but reclassified as type IX) the left eye (Figure 6) and subse- Am J Med Genet.
Recommended publications
  • General Contribution
    24 Abstracts of 37th Annual Meeting A1 A SCREENING METHOD FOR FRAGILE X MUTATION: DETECTION OF THE CGG REPEAT IN FMR-1 GENE BY PCR WITH BIOTIN-LABELED PRIMER. ..Eiji NANBA, Kousaku OHNO and Kenzo TAKESHITA Division of Child Neurology, Institute of Neurological Sciences, Tot- tori University School of Medicine. Yonago We have developed a new polymerase chain reaction(PCR)-based method for detection of the CGG repeat in FMR-1 gene. No specific product from PCR was detected on the gel with ethidium bromide staining, because 7-deaza-2'-dGTP is necessary for amplification of this repeat. Biotin-labeled primer was used for PCR and the product was transferred to a nylon membrane followed the detection of biotin by Smilight kit. The size of PCR product from normal control were slightly various and around 300bp. No PCR product was detected from 3 fragile X male patients in 2 families diagnosed by cytogenetic examination. This method is useful for genetic screen- ing of male mental retardation patients to exclude the fragile X mutation. A2 DNA ANALYSISFOR FRAGILE X SYNDROME Osamu KOSUDA,Utak00GASA, ~.ideynki INH, a~ji K/NAGIJCltI, and Kazumasa ]tIKIJI (SILL Inc., Tokyo) Fragile X syndrome is X-linked disease having the amplification of (CG6)n repeat sequence in the chromsomeXq27.3. We performed Southern blot analysis using three probes recognized repetitive sequence resion. Normal controle showed 5.2Kb with Eco RI digest and 2.7Kb with Eco RI/Bss ttII digest as the germ tines by the Southern blot analysis. However, three cell lines established fro~ unrelated the patients with fragile X showed the abnormal bands between 5.2 and 7.7Kb with Eco RI digest, and between 2.7 and 7.7Kb with Eco aI/Bss HII digest.
    [Show full text]
  • SUPPLEMENTARY MATERIAL Effect of Next
    SUPPLEMENTARY MATERIAL Effect of Next-Generation Exome Sequencing Depth for Discovery of Diagnostic Variants KKyung Kim1,2,3†, Moon-Woo Seong4†, Won-Hyong Chung3, Sung Sup Park4, Sangseob Leem1, Won Park5,6, Jihyun Kim1,2, KiYoung Lee1,2*‡, Rae Woong Park1,2* and Namshin Kim5,6** 1Department of Biomedical Informatics, Ajou University School of Medicine, Suwon 443-749, Korea 2Department of Biomedical Science, Graduate School, Ajou University, Suwon 443-749, Korea, 3Korean Bioinformation Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Korea, 4Department of Laboratory Medicine, Seoul National University Hospital College of Medicine, Seoul 110-799, Korea, 5Department of Functional Genomics, Korea University of Science and Technology, Daejeon 305-806, Korea, 6Epigenomics Research Center, Genome Institute, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Korea http//www. genominfo.org/src/sm/gni-13-31-s001.pdf Supplementary Table 1. List of diagnostic genes Gene Symbol Description Associated diseases ABCB11 ATP-binding cassette, sub-family B (MDR/TAP), member 11 Intrahepatic cholestasis ABCD1 ATP-binding cassette, sub-family D (ALD), member 1 Adrenoleukodystrophy ACVR1 Activin A receptor, type I Fibrodysplasia ossificans progressiva AGL Amylo-alpha-1, 6-glucosidase, 4-alpha-glucanotransferase Glycogen storage disease ALB Albumin Analbuminaemia APC Adenomatous polyposis coli Adenomatous polyposis coli APOE Apolipoprotein E Apolipoprotein E deficiency AR Androgen receptor Androgen insensitivity
    [Show full text]
  • Opthalmic Genetics
    Inherited Genetics Opthalmic Genetics What is Opthalmic Genetics? Developmental • Anterior segment dysgenesis Of the approximately 5000 genetic diseases and syndromes known to affect humans, at • Aniridia least one-third involve the eye. Due to advances in molecular genetics and sequencing • Anophthlamos/ microphthalmos/ nanophthalmos methods, there has been an exponential increase in the knowledge of genetic eye diseases and syndromes. • Coloboma Complex Prevalence • Cataract • Keratoconus • More than 60% of cases of blindness among infants are caused by inherited eye • Fuchs endothelial corneal dystrophy diseases such as congenital cataracts, congenital glaucoma, retinal degeneration, • Age-related macular degeneration optic atrophy, eye malformations and corneal dystrophies. • Glaucoma • Pseudoexfoliation syndrome What are the common Genetic Opthalmic • Diabetic retinopathy Disorders ? Why do you need to test for Genetic Ophthalmic Disorders can be classified according to the type of genetic abnormality Opthalmic Disorders? Monogenic • There is also evidence now that the most common vision problems among children and adults are genetically determined (Eg: strabismus, amblyopia, refractive errors • Corneal dystrophies such as myopia, hyperopia and astigmatism) • Oculocutaneous Albinism • Genetic ophthalmic disorders include a large number of ocular pathologies which • Norrie disease have autosomal dominant, autosomal recessive or X-linked inheritance patterns, or • Retinoschisis are complex traits with polygenic and environmental components
    [Show full text]
  • Genetic Investigation of 211 Chinese Families Expands the Mutational and Phenotypical Spectrum in Hereditary Retinopathy Genes Through Targeted Sequencing Technology
    Genetic investigation of 211 Chinese families expands the mutational and phenotypical spectrum in hereditary retinopathy genes through targeted sequencing technology Zhouxian Bai The First Aliated Hospital of Zhengzhou University https://orcid.org/0000-0001-7071-666X Yanchuan Xie First Aliated Hospital of Henan University of Science and technology Lina Liu First Aliated Hospital of Zhengzhou University Jingzhi Shao Southern Medical University Nanfang Hospital Yuying Liu First Aliated Hospital of Zhengzhou University Xiangdong Kong ( [email protected] ) https://orcid.org/0000-0003-0030-7638 Research article Keywords: hereditary retinopathy, novel mutations, targeted sequencing, genetic testing Posted Date: December 4th, 2020 DOI: https://doi.org/10.21203/rs.3.rs-20958/v2 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Version of Record: A version of this preprint was published at BMC Medical Genomics on March 29th, 2021. See the published version at https://doi.org/10.1186/s12920-021-00935-w. Page 1/22 Abstract Background: Hereditary retinopathy is a signicant cause of blindness worldwide. Despite the discovery of many mutations in various retinopathies, a large part of patients remain undiagnosed genetically. Targeted next generation sequencing of the human genome is a suitable approach for retinopathy molecular diagnosis. Methods: We described a cohort of 211 families from central China with various forms of retinopathy, 95 families of which were investigated using NGS multi-gene panel sequencing as well as the other 116 patients were LHON suspected tested by Sanger sequencing. We validated the candidate variants by PCR- based Sanger sequencing. We have made comprehensive analysis of the cases through sequencing data and ophthalmologic examination information.
    [Show full text]
  • Neurology, Neuromuscular, and Cardiology Disorders
    GENETIC TESTING SOLUTIONS FOR: NEUROLOGY, NEUROMUSCULAR, AND CARDIOLOGY DISORDERS EGL Genetics has nearly 50 years of genetic testing history built upon a strong academic foundation. Our expertise spans common and rare genetic disease testing, genomic variant interpretation, test development and research. As we have grown, we have evolved into a high-science and high-performing CLIA-certifi ed and CAP-accredited laboratory with over 1,100 test offerings across biochemical genetics, cytogenetics, and molecular genetic testing. COMPREHENSIVE OFFERINGS There are signifi cant genetic and phenotypic heterogeneity for disorders involving neurology, neuromuscular, and cardiovascular systems, and obtaining a specifi c diagnosis is important for prognosis, patient management, and development of therapeutic strategies. Consider this collection of test offerings for patients with heart disease, intellectual disability, autism spectrum disorders, movement disorders, epilepsy, and more. Identifi cation of a causative genetic defect may provide information for prognosis and therapeutic intervention, and is required for carrier testing and early prenatal diagnosis. TEST OFFERINGS FOR THE FOLLOWING CLINICAL INDICATIONS: • Cardiomyopathy and cardiovascular diseases • Autism and intellectual disabilities • Neuromuscular disorders and muscular dystrophy • Epilepsy • Movement disorders ADVANTAGES OF PARTNERING WITH EGL GENETICS: • Board-certifi ed laboratory directors & genetic counselors to answer clinical and analytical questions • Multiple sample collection
    [Show full text]
  • Pre-Implantation Genetic Diagnosis and Assisted Reproductive Technology in Haemophilia
    PRE-IMPLANTATION GENETIC DIAGNOSIS AND ASSISTED REPRODUCTIVE TECHNOLOGY IN HAEMOPHILIA DR PENELOPE FOSTER MELBOURNE IVF WHAT IS PGD ? early embryo diagnosis allows selection of unaffected embryos for transfer to patient alternative to antenatal testing and termination of affected pregnancy MELBOURNE IVF TECHNIQUE OF PGD standard IVF cycle biopsy of 1 or 2 cells from day 3 embryo diagnostic testing on biopsied cells selection of embryos for transfer MELBOURNE IVF PGD IN HAEMOPHILIA OPTIONS Sex selection: if affected husband, all male offspring unaffected, all females carriers = select male embryos for transfer if carrier wife, 1/2 males affected, 1/2 females carrier = select female embryos for transfer MELBOURNE IVF PGD IN HAEMOPHILIA OPTIONS Specific gene detection avoids discarding unaffected male embryos avoids transfer of carrier female embryos MELBOURNE IVF SEX SELECTION - FISH FLUORESCENT IN-SITU HYBRIDISATION detects chromosome number cell from embryo fixed to slide apply FISH probes DNA sequences complementary to small segment of particular chromosome probes labelled with coloured fluorochromes coloured spots indicate presence of sequence 8-probe FISH – chromosomes 4,13,16,18,21,22,X,Y select euploid XX or XY embryos for transfer MELBOURNE IVF FISH ON BLASTOMERES 13, 16, 18, 21, 22 X, Y, 4 MELBOURNE IVF XX XY MELBOURNE IVF PGD FOR SPECIFIC GENE DETECTION DNA amplification by PCR 2 cells from embryo fragment analysis on DNA sequencer inclusion of informative markers individualised tests for each couple significant
    [Show full text]
  • Manifesting Heterozygosity in Norrie's Disease?
    British3Journal ofOphthalmology 1993; 1i3813 CASE REPORTS Manifesting heterozygosity in Norrie's disease? G Woodruff, R Newbury-Ecob, D S Plaha, I D Young It is well recognised that Norrie's disease is an ii-2 X linked disorder causing blindness in early This 30-year-old man is of normal intelligence. infancy, often in association with hearing loss Assessment at age 22 years showed bilateral and/or psychomotor retardation.' The diagnosis pthisical eyes. is established by the finding of congenital pseudoglioma in a male infant with either typical systemic features or a family history of congeni- II-4 Department of Ophthalmology, tal blindness in male relatives.'2 We report here The 32-year-old mother of the proband (III-1) is University ofLeicester the ocular findings in a 2-year-old girl who of above average intelligence and has normal G Woodruff appears to be a manifesting carrier of Norrie's vision. Funduscopy and fluorescein angiography Department ofClinical disease, this being an observation which has were normal. Genetics, City Hospital, important implications for genetic counselling. Nottingham R Newbury-Ecob I D Young Case reports This 8-year-old boy was found to have bilateral Molecular Genetics The family pedigree is shown in Figure 1. total retinal detachment with retrolental masses Laboratory, Leicester at age 2 weeks. Royal Infirmary, and absent electroretinogram Leicester Horizontal corneal diameters were 10 mm (right) D S Plaha II-1 and 9 mm (left). Initial development appeared Correspondence to: This deceased male lived in Mauritius and was normal but by 3 years marked global delay was Mr G Woodruff, Department ofOphthalmology, Clinical first noted to be blind at age 2 years.
    [Show full text]
  • Norrie Disease Resulting from a Gene Deletion: Clinical Features and DNA Studies
    J Med Genet: first published as 10.1136/jmg.25.2.73 on 1 February 1988. Downloaded from Journal of Medical Genetics 1988, 25, 73-78 Norrie disease resulting from a gene deletion: clinical features and DNA studies DIAN DONNAI, R C MOUNTFORD, AND A P READ From the Department of Medical Genetics, St Mary's Hospital, Manchester M13 OJH. SUMMARY We describe a family in which two boys with Norrie disease have a deletion of the DXS7 locus. The deletion does not extend as far distally as the OTC or DXS84 loci. A full clinical description of the patients is given to help establish the range of manifestations of Norrie disease. There is no evidence of any other X linked disease in our patients. Norrie disease (NDP, McKusick No 31060) was guineous parents after a normal pregnancy. Deli-'- originally described as X linked blindness.' It is very was normal and his birth weight was 2-6 kg at characterised by early vascular proliferation term. His mother noted that his eyes looked cloudy (pseudoglioma) in both retinas, atrophic irides, on the eighth day of life. After ophthalmic evalua- corneal clouding, and cataracts, progressing to tion a diagnosis of primary hyperplastic vitreous was shrinkage of the globes (phthisis bulbi). The eye suggested and his left eye was enucleated at 14 findings are well described,25 but extraocular months because of shrinkage, pain, and the possi- abnormalities are less commonly illustrated. Diag- bility of a tumour. Developmental delay was ap- copyright. nosis is usually made on ophthalmological criteria, parent from six months but investigations at that but we believe that in many cases the disorder is time did not identify the cause.
    [Show full text]
  • A New Neurological Syndrome with Mental Retardation
    Am. J. Hum. Genet. 65:1406–1412, 1999 A New Neurological Syndrome with Mental Retardation, Choreoathetosis, and Abnormal Behavior Maps to Chromosome Xp11 Edwin Reyniers,1 Patrick Van Bogaert,2 Nils Peeters,1 Lieve Vits,1 Fernand Pauly,3 Erik Fransen,1 Nicole Van Regemorter,2 and R. Frank Kooy1 1Department of Medical Genetics, University of Antwerp, Antwerp; 2Hoˆpital Erasme, ULB, Brussels; and 3Centre Hospitalier de Luxembourg, Luxembourg Summary movements (athetosis). It occurs in a variety of clinically and genetically diverse disorders, albeit rarely in familial Choreoathetosis is a major clinical feature in only a small forms. Only three X-linked mental retardation syn- number of hereditary neurological disorders. We define dromes showing choreoathetoid movements—Lesch- a new X-linked syndrome with a unique clinical picture Nyhan syndrome (MIM 308000), Schimke X-linked characterized by mild mental retardation, choreoathe- mental retardation syndrome (MIM 312840), and Pet- tosis, and abnormal behavior. We mapped the disease tigrew syndrome (MRXS5; MIM 304340)—have been in a four-generation pedigree to chromosome Xp11 by described. Lesch-Nyhan syndrome is a rare recessive dis- linkage analysis and defined a candidate region contain- order of purine metabolism due to mutations in the hy- ing a number of genes possibly involved in neuronal poxanthine phosphoribosyl transferase gene (HPRT) signaling, including a potassium channel gene and a neu- (Rossiter et al. 1991) and is characterized by hypercur- ronal G protein–coupled receptor. icemia, spasticity, choreoathetosis, dystonia, self-injuri- ous behavior, and aggression (Nyhan et al. 1967). Child- hood-onset choreoathetosis combined with postnatal microcephaly, growth and mental retardation, apparent external ophthalmoplegia, and varying degrees of deaf- Introduction ness characterize Schimke X-linked mental retardation (Schimke et al.
    [Show full text]
  • Genes Covered and Disorders Detected by X-HR Microarray
    UPMC Cytogenetics Laboratory X High Resolution Microarray GENES COVERED BY X-HR AND SYNDROMES DETECTED BY X-HR Gene Location Syndrome ABCB7 Xq12-q13 Anemia, sideroblastic, with ataxia ABCD1 Xq28 Adrenoleukodystrophy ACSL4 Xq22.3-q23 X-linked mental retardation AFF2 Xq28 Fragile X E (FRAXE) mental retardation AGTR2 Xq22-q23 Mental retardation, X-linked ALAS2 Xp11.21 Anemia, sideroblastic, X-linked AP1S2 Xp22.2 Mental retardation, X-linked AR Xq11.2-q12 Androgen insensitivity syndrome ARHGEF6 Xq26.3 Mental retardation, X-linked ARHGEF9 Xq11.1 X-linked mental retardation (XLMR)//Hyperekplexia and epilepsy ARSE Xp22.3 Chondrodysplasia punctata, X-linked recessive (CDPX) ARX Xp21 Infantile spasm syndrome, X-linked (ISSX), West, Proud, XLAG, Partington, multifocal epilepsy //Early infantile epileptic encephalopathy-1 (EIEE1)( X-linked infantile spasm syndrome-1-ISSX1) ATP6AP2 Xp11.4 Mental retardation, X-linked, with epilepsy (XMRE) ATP7A Xq13.2- Menkes disease (MNK) and occipital horn syndrome q13.3 ATRX Xq13.1- ATRX, XLMR-Hypotonic facies syndrome, ATR-X, and others q21.1 AVPR2 Xq28 Nephrogenic syndrome of inappropriate antidiuresis; NSI; Diabetes insipidus, nephrogenic BCOR Xp21.2- Microphthalmia syndromic (MCOPS2) p11.4 BMP15 Xp11.2 Ovarian dysgenesis 2 BRWD3 Xq21.1 Mental retardation, X-linked 93 BTK Xq21.33-q22 X-linked agammaglobulinemia CACNA1F Xp11.23 Aland Island eye disease CASK Xp11.4 X-linked mental retardation with microcephaly & disproportionate pontine and cerebellar hypoplasia (MICPCH) syndrome CD40LG Xq26 Immunodeficiency,
    [Show full text]
  • Norrie Disease
    Norrie disease Description Norrie disease is an inherited eye disorder that leads to blindness in male infants at birth or soon after birth. It causes abnormal development of the retina, the layer of sensory cells that detect light and color, with masses of immature retinal cells accumulating at the back of the eye. As a result, the pupils appear white when light is shone on them, a sign called leukocoria. The irises (colored portions of the eyes) or the entire eyeballs may shrink and deteriorate during the first months of life, and cataracts ( cloudiness in the lens of the eye) may eventually develop. About 30 percent of individuals with Norrie disease develop progressive hearing loss, and 30 to 50 percent of people affected experience developmental delays in motor skills such as sitting up and walking. Other problems may include mild to moderate intellectual disability, often with psychosis, and abnormalities that can affect circulation, breathing, digestion, excretion, or reproduction. Frequency Norrie disease is a rare disorder; more than 400 cases have been reported in the scientific literature. Causes Mutations in the NDP gene cause Norrie disease. The NDP gene provides instructions for making a protein called norrin. Norrin participates in the Wnt cascade, a sequence of steps that affect the way cells and tissues develop. In particular, norrin seems to play a critical role in the specialization of retinal cells for their unique sensory capabilities. It is also involved in the establishment of a blood supply to tissues of the retina and the inner ear, and the development of other body systems.
    [Show full text]
  • A Fetus with an X;1 Balanced Reciprocal Translocation and Eye
    I Med Genet 1995;32:557-560 557 A fetus with an X; 1 balanced reciprocal translocation and eye disease J Med Genet: first published as 10.1136/jmg.32.7.557 on 1 July 1995. Downloaded from Mary J Seller, Kalyani Pal, Sharon Horsley, Angela F Davies, A Caroline Berry, R Meredith, Alison C E McCartney Abstract changes consistent with the early stages ofNor- A 19 week female fetus is described with a rie disease. de novo X;1 reciprocal balanced trans- location, with the breakpoint on the X chromosome at Xpll.4, and eye pathology Case report consistent with the early stages of Norrie This was the sixth pregnancy of a healthy white disease. The fetus seems to be an example couple aged 37 and 41 years. The previous of a female manifesting an X linked re- children, five boys and one girl, are well, in- cessive disease, and it was shown that the cluding a boy, one of twins and now 13 years normal X chromosome was completely old, who had surgery during infancy for trans- inactivated in all cells examined. Norrie position ofthe great vessels. The family history disease has been mapped to Xpll.3, and did not indicate anything significant except for fluorescence in situ hybridisation studies a niece on the paternal side who had multiple showed that the Norrie disease gene had abnormalities and died. No precise diagnosis not obviously been disrupted. Mutation had been made but a chromosome abnormality screening by SSCP analysis showed no was suspected. For this reason, and on grounds aberrant fragments of the coding region of maternal age, chorionic villus sampling was ofthe gene.
    [Show full text]