Congenital Hand Anomalies and Associated Syndromes Ghazi M
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Neonatal Orthopaedics
NEONATAL ORTHOPAEDICS NEONATAL ORTHOPAEDICS Second Edition N De Mazumder MBBS MS Ex-Professor and Head Department of Orthopaedics Ramakrishna Mission Seva Pratishthan Vivekananda Institute of Medical Sciences Kolkata, West Bengal, India Visiting Surgeon Department of Orthopaedics Chittaranjan Sishu Sadan Kolkata, West Bengal, India Ex-President West Bengal Orthopaedic Association (A Chapter of Indian Orthopaedic Association) Kolkata, West Bengal, India Consultant Orthopaedic Surgeon Park Children’s Centre Kolkata, West Bengal, India Foreword AK Das ® JAYPEE BROTHERS MEDICAL PUBLISHERS (P) LTD. New Delhi • London • Philadelphia • Panama (021)66485438 66485457 www.ketabpezeshki.com ® Jaypee Brothers Medical Publishers (P) Ltd. Headquarters Jaypee Brothers Medical Publishers (P) Ltd. 4838/24, Ansari Road, Daryaganj New Delhi 110 002, India Phone: +91-11-43574357 Fax: +91-11-43574314 Email: [email protected] Overseas Offices J.P. Medical Ltd. Jaypee-Highlights Medical Publishers Inc. Jaypee Brothers Medical Publishers Ltd. 83, Victoria Street, London City of Knowledge, Bld. 237, Clayton The Bourse SW1H 0HW (UK) Panama City, Panama 111, South Independence Mall East Phone: +44-2031708910 Phone: +507-301-0496 Suite 835, Philadelphia, PA 19106, USA Fax: +02-03-0086180 Fax: +507-301-0499 Phone: +267-519-9789 Email: [email protected] Email: [email protected] Email: [email protected] Jaypee Brothers Medical Publishers (P) Ltd. Jaypee Brothers Medical Publishers (P) Ltd. 17/1-B, Babar Road, Block-B, Shaymali Shorakhute, Kathmandu Mohammadpur, Dhaka-1207 Nepal Bangladesh Phone: +00977-9841528578 Mobile: +08801912003485 Email: [email protected] Email: [email protected] Website: www.jaypeebrothers.com Website: www.jaypeedigital.com © 2013, Jaypee Brothers Medical Publishers All rights reserved. No part of this book may be reproduced in any form or by any means without the prior permission of the publisher. -
Increased Nuchal Translucency Precision Panel
Increased Nuchal Translucency Precision Panel Overview Increased Nuchal Translucency (NT) is defined as an abnormal accumulation of fluid in the nuchal area, which is visualized as a thickened sonolucent area. It is a standardized measure obtained between 11 and 14 weeks of gestation to calculate the risk of a fetus being affected by a chromosomal aneuploidy. NT>3.5mm has been found to be associated with fetal chromosomal abnormalities and single-gene disorders as well as cardiac defects and other structural abnormalities in euploid and aneuploid fetuses. Proportionally as NT increases, even with a normal karyotype, there is a higher risk of adverse pregnancy outcomes such as miscarriage, intrauterine death, congenital heart defects and numerous other structural and genetic syndromes. There is not one single cause of increased NT, it is based on a complex and multifactorial process, linked to one or more embryonic processes. It has been shown that a persistently increased NT with a normal karyotype and aCGH has a 4-10% probability of being associated to Noonan Syndrome and/or other RASopathies using Whole Exome Sequencing (WES). However, the general tendency following detection of isolated enlarged NT in an euploid fetus is that most babies with normal detailed ultrasound examination and echocardiography will have uneventful outcomes. The Igenomix Increased Nuchal Translucency Precision Panel can be used to make a directed and accurate prenatal differential diagnosis of increased nuchal translucency in patients with or without a normal karyotype ultimately leading to a better management and prognosis of the associated comorbidities. It provides a comprehensive analysis of the genes involved in this disease using next-generation sequencing (NGS) to fully understand the spectrum of relevant genes involved. -
FGFR2 Mutations in Pfeiffer Syndrome
© 1995 Nature Publishing Group http://www.nature.com/naturegenetics correspondent FGFR2 mutations in Pfeiffer syndrome Sir-In the past few months, several genetic diseases have been ascribed to mutations in genes of the fibroblast growth factor receptor (FGFR) family, including achondroplasia (FGFR3) J-z, Crouzon syndrome (FGFR2)3 and 4 m/+ Pfeiffer syndrome (FGFR1) • In D321A addition, two clinically distinct N:Jl GIJ; AM craniosynostotic conditions, Jackson ~ Weiss and Crouzon syndromes, have c been ascribed to allelic mutations in the FGFR2 gene, suggesting that FGFR2mutations might have variable 5 phenotypic effects • We have recently FGFR2 found point mutations in the m/+ gene in two unrelated cases of Pfeiffer syndrome supporting the view that this craniosynostotic syndrome, is a 4 6 genetically heterogenous condition • • Pfeiffer syndrome is an autosomal dominant form of acrocephalo Fig. 1 Mutations of FGFR2 in two unrelated patients with craniofacial, hand syndactyly (ACS) characterized by and foot anomalies characteristic of Pfeiffer syndrome. Note midface craniosynostosis (brachycephaly retrusion, hypertelorism, proptosis and radiological evidence of enlargement type) with deviation and enlargement of thumb, with ankylosis of the second and third phalanges and the short, broad and deviated great toes. m, mutation; +, wild type sequence. The of the thumbs and great toes, sequence of wild type and mutant genes are shown and the arrow indicates brachymesophalangy, with pha the base substitution resulting in the mutation. langeal ankylosis and a varying degree of soft tissue syndactyly7.8. One of our sporadic cases and one familial form of ACS fulfilled the clinical criteria ofthe Pfeiffer syndrome, with particular respect to interphalangeal an aspartic acid into an alanine in the Elisabeth Lajeunie ankylosis (Fig. -
Advances in Understanding the Genetics of Syndromes Involving Congenital Upper Limb Anomalies
Review Article Page 1 of 10 Advances in understanding the genetics of syndromes involving congenital upper limb anomalies Liying Sun1#, Yingzhao Huang2,3,4#, Sen Zhao2,3,4, Wenyao Zhong1, Mao Lin2,3,4, Yang Guo1, Yuehan Yin1, Nan Wu2,3,4, Zhihong Wu2,3,5, Wen Tian1 1Hand Surgery Department, Beijing Jishuitan Hospital, Beijing 100035, China; 2Beijing Key Laboratory for Genetic Research of Skeletal Deformity, Beijing 100730, China; 3Medical Research Center of Orthopedics, Chinese Academy of Medical Sciences, Beijing 100730, China; 4Department of Orthopedic Surgery, 5Department of Central Laboratory, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China Contributions: (I) Conception and design: W Tian, N Wu, Z Wu, S Zhong; (II) Administrative support: All authors; (III) Provision of study materials or patients: All authors; (IV) Collection and assembly of data: Y Huang; (V) Data analysis and interpretation: L Sun; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. Correspondence to: Wen Tian. Hand Surgery Department, Beijing Jishuitan Hospital, Beijing 100035, China. Email: [email protected]. Abstract: Congenital upper limb anomalies (CULA) are a common birth defect and a significant portion of complicated syndromic anomalies have upper limb involvement. Mostly the mortality of babies with CULA can be attributed to associated anomalies. The cause of the majority of syndromic CULA was unknown until recently. Advances in genetic and genomic technologies have unraveled the genetic basis of many syndromes- associated CULA, while at the same time highlighting the extreme heterogeneity in CULA genetics. Discoveries regarding biological pathways and syndromic CULA provide insights into the limb development and bring a better understanding of the pathogenesis of CULA. -
Megalencephaly and Macrocephaly
277 Megalencephaly and Macrocephaly KellenD.Winden,MD,PhD1 Christopher J. Yuskaitis, MD, PhD1 Annapurna Poduri, MD, MPH2 1 Department of Neurology, Boston Children’s Hospital, Boston, Address for correspondence Annapurna Poduri, Epilepsy Genetics Massachusetts Program, Division of Epilepsy and Clinical Electrophysiology, 2 Epilepsy Genetics Program, Division of Epilepsy and Clinical Department of Neurology, Fegan 9, Boston Children’s Hospital, 300 Electrophysiology, Department of Neurology, Boston Children’s Longwood Avenue, Boston, MA 02115 Hospital, Boston, Massachusetts (e-mail: [email protected]). Semin Neurol 2015;35:277–287. Abstract Megalencephaly is a developmental disorder characterized by brain overgrowth secondary to increased size and/or numbers of neurons and glia. These disorders can be divided into metabolic and developmental categories based on their molecular etiologies. Metabolic megalencephalies are mostly caused by genetic defects in cellular metabolism, whereas developmental megalencephalies have recently been shown to be caused by alterations in signaling pathways that regulate neuronal replication, growth, and migration. These disorders often lead to epilepsy, developmental disabilities, and Keywords behavioral problems; specific disorders have associations with overgrowth or abnor- ► megalencephaly malities in other tissues. The molecular underpinnings of many of these disorders are ► hemimegalencephaly now understood, providing insight into how dysregulation of critical pathways leads to ► -
Genes in Eyecare Geneseyedoc 3 W.M
Genes in Eyecare geneseyedoc 3 W.M. Lyle and T.D. Williams 15 Mar 04 This information has been gathered from several sources; however, the principal source is V. A. McKusick’s Mendelian Inheritance in Man on CD-ROM. Baltimore, Johns Hopkins University Press, 1998. Other sources include McKusick’s, Mendelian Inheritance in Man. Catalogs of Human Genes and Genetic Disorders. Baltimore. Johns Hopkins University Press 1998 (12th edition). http://www.ncbi.nlm.nih.gov/Omim See also S.P.Daiger, L.S. Sullivan, and B.J.F. Rossiter Ret Net http://www.sph.uth.tmc.edu/Retnet disease.htm/. Also E.I. Traboulsi’s, Genetic Diseases of the Eye, New York, Oxford University Press, 1998. And Genetics in Primary Eyecare and Clinical Medicine by M.R. Seashore and R.S.Wappner, Appleton and Lange 1996. M. Ridley’s book Genome published in 2000 by Perennial provides additional information. Ridley estimates that we have 60,000 to 80,000 genes. See also R.M. Henig’s book The Monk in the Garden: The Lost and Found Genius of Gregor Mendel, published by Houghton Mifflin in 2001 which tells about the Father of Genetics. The 3rd edition of F. H. Roy’s book Ocular Syndromes and Systemic Diseases published by Lippincott Williams & Wilkins in 2002 facilitates differential diagnosis. Additional information is provided in D. Pavan-Langston’s Manual of Ocular Diagnosis and Therapy (5th edition) published by Lippincott Williams & Wilkins in 2002. M.A. Foote wrote Basic Human Genetics for Medical Writers in the AMWA Journal 2002;17:7-17. A compilation such as this might suggest that one gene = one disease. -
Larsen Syndrome
I M A G E S Larsen Syndrome Larsen syndrome (OMIM 150250) is a complex syndrome with genetic heterogeneity, and with both autosomal dominant and autosomal recessive An eleven year old male child born to a patterns of inheritance. Mutations in gene encoding nonconsanguinous couple presented with multiple filamin B (FLNB) result in Larsen syndrome. This joint dislocation since birth. He had mild motor gene has an important role in vertebral delay. Examination showed presence of short segmentation, joint formation and endochondral stature. There was no microcephaly. He had flat ossification and is also mutated in atelosteogenesis facies, prominent forehead, depressed nasal bridge, types I and III, and in spondylocarpotarsal and hypertelorism (Fig. 1). He had bilateral syndromes. Autosomal dominant form is rhizomelic shortening of upper limbs, spatulate and characterized by flat facies, joint hypermobility, dislocated thumbs (Fig. 2), bilateral elbow, ankle, congenital multiple joint dislocations, especially of and hip dislocation (Fig.3). Examination of parents the knees and talipes equinovarus. The mid-face is did not reveal any features of Larsen syndrome. hypoplastic with a depressed nasal bridge. Cleft X-rays of long bones showed presence of bilateral palate may be present. Osteoarthritis involving large tibio-femoral and patellar dislocation at knees and joints and progressive kyphoscoliosis are potential dislocation at hip, ankles and thumbs. He also had complications. Airway obstruction caused by hypoplastic fibula on right side. X-ray spine showed tracheomalacia and bronchomalacia may be life presence of short and thick pedicles, kyphosis and threatening. All affected individuals should be hypoplastic superior articular facets. There was no evaluated for cervical spine instability and caution atlanto axial dislocation. -
Genetic Causes of Congenital Malformation in India
International Journal of Human Genetics ISSN: 0972-3757 (Print) (Online) Journal homepage: http://www.tandfonline.com/loi/rhug20 Genetic Causes of Congenital Malformation in India Geeta Talukder & Archana Sharma To cite this article: Geeta Talukder & Archana Sharma (2006) Genetic Causes of Congenital Malformation in India, International Journal of Human Genetics, 6:1, 15-25, DOI: 10.1080/09723757.2006.11885942 To link to this article: https://doi.org/10.1080/09723757.2006.11885942 Published online: 04 Sep 2017. Submit your article to this journal Article views: 2 View related articles Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=rhug20 © Kamla-Raj 2006 Int J Hum Genet, 6(1): 15-25 (2006) Genetic Causes of Congenital Malformation in India Geeta Talukder1 and Archana Sharma2 1. Vivekananda Institute of Medical Sciences, 99 Sarat Bose Road, Kolkata 700 026, West Bengal, India E-mail: geetatalukdar @hotmail.com 2. CAS in Cell & Chromosome Research, Department of Botany, University College of Science, 35 Ballygunj Circular Road, Kolkata 700 019, West Bengal, India KEYWORDS Congenital malformations; neonates; stillbirths; prenatal detection; prevention ABSTRACT Congenital malformations are a major cause of death of neonates in India where prenatal detection and treatment are not adequate in many hospitals and health centers. Incidence is specially high in stillbirths. It is not realized that genetic causes - chromosomal, single gene and polygenic - are the main causes of many congenital defects and early detection and prevention should be essential to make the small family norm a success. INTRODUCTION Recently Patel and Adhia (2005) detected major malformations in 7.92% of 17653 births and Phenotypic changes of genetic diseases at were able to attribute chromosomal cause to birth include congenital malformations in 4%,polygenic to 45.1% and total genetic chromosomes and single gene defects. -
The Genetic Heterogeneity of Brachydactyly Type A1: Identifying the Molecular Pathways
The genetic heterogeneity of brachydactyly type A1: Identifying the molecular pathways Lemuel Jean Racacho Thesis submitted to the Faculty of Graduate Studies and Postdoctoral Studies in partial fulfillment of the requirements for the Doctorate in Philosophy degree in Biochemistry Specialization in Human and Molecular Genetics Department of Biochemistry, Microbiology and Immunology Faculty of Medicine University of Ottawa © Lemuel Jean Racacho, Ottawa, Canada, 2015 Abstract Brachydactyly type A1 (BDA1) is a rare autosomal dominant trait characterized by the shortening of the middle phalanges of digits 2-5 and of the proximal phalange of digit 1 in both hands and feet. Many of the brachymesophalangies including BDA1 have been associated with genetic perturbations along the BMP-SMAD signaling pathway. The goal of this thesis is to identify the molecular pathways that are associated with the BDA1 phenotype through the genetic assessment of BDA1-affected families. We identified four missense mutations that are clustered with other reported BDA1 mutations in the central region of the N-terminal signaling peptide of IHH. We also identified a missense mutation in GDF5 cosegregating with a semi-dominant form of BDA1. In two families we reported two novel BDA1-associated sequence variants in BMPR1B, the gene which codes for the receptor of GDF5. In 2002, we reported a BDA1 trait linked to chromosome 5p13.3 in a Canadian kindred (BDA1B; MIM %607004) but we did not discover a BDA1-causal variant in any of the protein coding genes within the 2.8 Mb critical region. To provide a higher sensitivity of detection, we performed a targeted enrichment of the BDA1B locus followed by high-throughput sequencing. -
Genetics of Congenital Hand Anomalies
G. C. Schwabe1 S. Mundlos2 Genetics of Congenital Hand Anomalies Die Genetik angeborener Handfehlbildungen Original Article Abstract Zusammenfassung Congenital limb malformations exhibit a wide spectrum of phe- Angeborene Handfehlbildungen sind durch ein breites Spektrum notypic manifestations and may occur as an isolated malforma- an phänotypischen Manifestationen gekennzeichnet. Sie treten tion and as part of a syndrome. They are individually rare, but als isolierte Malformation oder als Teil verschiedener Syndrome due to their overall frequency and severity they are of clinical auf. Die einzelnen Formen kongenitaler Handfehlbildungen sind relevance. In recent years, increasing knowledge of the molecu- selten, besitzen aber aufgrund ihrer Häufigkeit insgesamt und lar basis of embryonic development has significantly enhanced der hohen Belastung für Betroffene erhebliche klinische Rele- our understanding of congenital limb malformations. In addi- vanz. Die fortschreitende Erkenntnis über die molekularen Me- tion, genetic studies have revealed the molecular basis of an in- chanismen der Embryonalentwicklung haben in den letzten Jah- creasing number of conditions with primary or secondary limb ren wesentlich dazu beigetragen, die genetischen Ursachen kon- involvement. The molecular findings have led to a regrouping of genitaler Malformationen besser zu verstehen. Der hohe Grad an malformations in genetic terms. However, the establishment of phänotypischer Variabilität kongenitaler Handfehlbildungen er- precise genotype-phenotype correlations for limb malforma- schwert jedoch eine Etablierung präziser Genotyp-Phänotyp- tions is difficult due to the high degree of phenotypic variability. Korrelationen. In diesem Übersichtsartikel präsentieren wir das We present an overview of congenital limb malformations based Spektrum kongenitaler Malformationen, basierend auf einer ent- 85 on an anatomic and genetic concept reflecting recent molecular wicklungsbiologischen, anatomischen und genetischen Klassifi- and developmental insights. -
SKELETAL DYSPLASIA Dr Vasu Pai
SKELETAL DYSPLASIA Dr Vasu Pai Skeletal dysplasia are the result of a defective growth and development of the skeleton. Dysplastic conditions are suspected on the basis of abnormal stature, disproportion, dysmorphism, or deformity. Diagnosis requires Simple measurement of height and calculation of proportionality [<60 inches: consideration of dysplasia is appropriate] Dysmorphic features of the face, hands, feet or deformity A complete physical examination Radiographs: Extremities and spine, skull, Pelvis, Hand Genetics: the risk of the recurrence of the condition in the family; Family evaluation. Dwarf: Proportional: constitutional or endocrine or malnutrition Disproportion [Trunk: Extremity] a. Height < 42” Diastrophic Dwarfism < 48” Achondroplasia 52” Hypochondroplasia b. Trunk-extremity ratio May have a normal trunk and short limbs (achondroplasia), Short trunk and limbs of normal length (e.g., spondylo-epiphyseal dysplasia tarda) Long trunk and long limbs (e.g., Marfan’s syndrome). c. Limb-segment ratio Normal: Radius-Humerus ratio 75% Tibia-Femur 82% Rhizomelia [short proximal segments as in Achondroplastics] Mesomelia: Dynschondrosteosis] Acromelia [short hands and feet] RUBIN CLASSIFICATION 1. Hypoplastic epiphysis ACHONDROPLASTIC Autosomal Dominant: 80%; 0.5-1.5/10000 births Most common disproportionate dwarfism. Prenatal diagnosis: 18 weeks by measuring femoral and humeral lengths. Abnormal endochondral bone formation: zone of hypertrophy. Gene defect FGFR fibroblast growth factor receptor 3 . chromosome 4 Rhizomelic pattern, with the humerus and femur affected more than the distal extremities; Facies: Frontal bossing; Macrocephaly; Saddle nose Maxillary hypoplasia, Mandibular prognathism Spine: Lumbar lordosis and Thoracolumbar kyphosis Progressive genu varum and coxa valga Wedge shaped gaps between 3rd and 4th fingers (trident hands) Trident hand 50%, joint laxity Pathology Lack of columnation Bony plate from lack of growth Disorganized metaphysis Orthopaedics 1. -
Orphanet Journal of Rare Diseases Biomed Central
Orphanet Journal of Rare Diseases BioMed Central Review Open Access Brachydactyly Samia A Temtamy* and Mona S Aglan Address: Department of Clinical Genetics, Human Genetics and Genome Research Division, National Research Centre (NRC), El-Buhouth St., Dokki, 12311, Cairo, Egypt Email: Samia A Temtamy* - [email protected]; Mona S Aglan - [email protected] * Corresponding author Published: 13 June 2008 Received: 4 April 2008 Accepted: 13 June 2008 Orphanet Journal of Rare Diseases 2008, 3:15 doi:10.1186/1750-1172-3-15 This article is available from: http://www.ojrd.com/content/3/1/15 © 2008 Temtamy and Aglan; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract Brachydactyly ("short digits") is a general term that refers to disproportionately short fingers and toes, and forms part of the group of limb malformations characterized by bone dysostosis. The various types of isolated brachydactyly are rare, except for types A3 and D. Brachydactyly can occur either as an isolated malformation or as a part of a complex malformation syndrome. To date, many different forms of brachydactyly have been identified. Some forms also result in short stature. In isolated brachydactyly, subtle changes elsewhere may be present. Brachydactyly may also be accompanied by other hand malformations, such as syndactyly, polydactyly, reduction defects, or symphalangism. For the majority of isolated brachydactylies and some syndromic forms of brachydactyly, the causative gene defect has been identified.