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Hyperplasia (Growth Factors
Adaptations Robbins Basic Pathology Robbins Basic Pathology Robbins Basic Pathology Coagulation Robbins Basic Pathology Robbins Basic Pathology Homeostasis • Maintenance of a steady state Adaptations • Reversible functional and structural responses to physiologic stress and some pathogenic stimuli • New altered “steady state” is achieved Adaptive responses • Hypertrophy • Altered demand (muscle . hyper = above, more activity) . trophe = nourishment, food • Altered stimulation • Hyperplasia (growth factors, . plastein = (v.) to form, to shape; hormones) (n.) growth, development • Altered nutrition • Dysplasia (including gas exchange) . dys = bad or disordered • Metaplasia . meta = change or beyond • Hypoplasia . hypo = below, less • Atrophy, Aplasia, Agenesis . a = without . nourishment, form, begining Robbins Basic Pathology Cell death, the end result of progressive cell injury, is one of the most crucial events in the evolution of disease in any tissue or organ. It results from diverse causes, including ischemia (reduced blood flow), infection, and toxins. Cell death is also a normal and essential process in embryogenesis, the development of organs, and the maintenance of homeostasis. Two principal pathways of cell death, necrosis and apoptosis. Nutrient deprivation triggers an adaptive cellular response called autophagy that may also culminate in cell death. Adaptations • Hypertrophy • Hyperplasia • Atrophy • Metaplasia HYPERTROPHY Hypertrophy refers to an increase in the size of cells, resulting in an increase in the size of the organ No new cells, just larger cells. The increased size of the cells is due to the synthesis of more structural components of the cells usually proteins. Cells capable of division may respond to stress by undergoing both hyperrtophy and hyperplasia Non-dividing cell increased tissue mass is due to hypertrophy. -
Optic Nerve Hypoplasia Plus: a New Way of Looking at Septo-Optic Dysplasia
Optic Nerve Hypoplasia Plus: A New Way of Looking at Septo-Optic Dysplasia Item Type text; Electronic Thesis Authors Mohan, Prithvi Mrinalini Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 29/09/2021 22:50:06 Item License http://rightsstatements.org/vocab/InC/1.0/ Link to Item http://hdl.handle.net/10150/625105 OPTIC NERVE HYPOPLASIA PLUS: A NEW WAY OF LOOKING AT SEPTO-OPTIC DYSPLASIA By PRITHVI MRINALINI MOHAN ____________________ A Thesis Submitted to The Honors College In Partial Fulfillment of the Bachelors degree With Honors in Physiology THE UNIVERSITY OF ARIZONA M A Y 2 0 1 7 Approved by: ____________________________ Dr. Vinodh Narayanan Center for Rare Childhood Disorders Abstract Septo-optic dysplasia (SOD) is a rare congenital disorder that affects 1/10,000 live births. At its core, SOD is a disorder resulting from improper embryological development of mid-line brain structures. To date, there is no comprehensive understanding of the etiology of SOD. Currently, SOD is diagnosed based on the presence of at least two of the following three factors: (i) optic nerve hypoplasia (ii) improper pituitary gland development and endocrine dysfunction and (iii) mid-line brain defects, including agenesis of the septum pellucidum and/or corpus callosum. A literature review of existing research on the disorder was conducted. The medical history and genetic data of 6 patients diagnosed with SOD were reviewed to find damaging variants. -
Polymicrogyria (PMG) ‘Many–Small–Folds’
Polymicrogyria Dr Andrew Fry Clinical Senior Lecturer in Medical Genetics Institute of Medical Genetics, Cardiff [email protected] Polymicrogyria (PMG) ‘Many–small–folds’ • PMG is heterogeneous – in aetiology and phenotype • A disorder of post-migrational cortical organisation. PMG often appears thick on MRI with blurring of the grey-white matter boundary Normal PMG On MRI PMG looks thick but the cortex is actually thin – with folded, fused gyri Courtesy of Dr Jeff Golden, Pen State Unv, Philadelphia PMG is often confused with pachygyria (lissencephaly) Thick cortex (10 – 20mm) Axial MRI 4 cortical layers Lissencephaly Polymicrogyria Cerebrum Classical lissencephaly is due Many small gyri – often to under-migration. fused together. Axial MRI image at 7T showing morphological aspects of PMG. Guerrini & Dobyns Malformations of cortical development: clinical features and genetic causes. Lancet Neurol. 2014 Jul; 13(7): 710–726. PMG - aetiology Pregnancy history • Intrauterine hypoxic/ischemic brain injury (e.g. death of twin) • Intrauterine infection (e.g. CMV, Zika virus) TORCH, CMV PCR, [+deafness & cerebral calcification] CT scan • Metabolic (e.g. Zellweger syndrome, glycine encephalopathy) VLCFA, metabolic Ix • Genetic: Family history Familial recurrence (XL, AD, AR) Chromosomal abnormalities (e.g. 1p36 del, 22q11.2 del) Syndromic (e.g. Aicardi syndrome, Kabuki syndrome) Examin - Monogenic (e.g. TUBB2B, TUBA1A, GPR56) Array ation CGH Gene test/Panel/WES/WGS A cohort of 121 PMG patients Aim: To explore the natural history of PMG and identify new genes. Recruited: • 99 unrelated patients • 22 patients from 10 families 87% White British, 53% male ~92% sporadic cases (NB. ascertainment bias) Sporadic PMG • Array CGH, single gene and gene panel testing - then a subset (n=57) had trio-WES. -
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. -
MICHIGAN BIRTH DEFECTS REGISTRY Cytogenetics Laboratory Reporting Instructions 2002
MICHIGAN BIRTH DEFECTS REGISTRY Cytogenetics Laboratory Reporting Instructions 2002 Michigan Department of Community Health Community Public Health Agency and Center for Health Statistics 3423 N. Martin Luther King Jr. Blvd. P. O. Box 30691 Lansing, Michigan 48909 Michigan Department of Community Health James K. Haveman, Jr., Director B-274a (March, 2002) Authority: P.A. 236 of 1988 BIRTH DEFECTS REGISTRY MICHIGAN DEPARTMENT OF COMMUNITY HEALTH BIRTH DEFECTS REGISTRY STAFF The Michigan Birth Defects Registry staff prepared this manual to provide the information needed to submit reports. The manual contains copies of the legislation mandating the Registry, the Rules for reporting birth defects, information about reportable and non reportable birth defects, and methods of reporting. Changes in the manual will be sent to each hospital contact to assist in complete and accurate reporting. We are interested in your comments about the manual and any suggestions about information you would like to receive. The Michigan Birth Defects Registry is located in the Office of the State Registrar and Division of Health Statistics. Registry staff can be reached at the following address: Michigan Birth Defects Registry 3423 N. Martin Luther King Jr. Blvd. P.O. Box 30691 Lansing MI 48909 Telephone number (517) 335-8678 FAX (517) 335-9513 FOR ASSISTANCE WITH SPECIFIC QUESTIONS PLEASE CONTACT Glenn E. Copeland (517) 335-8677 Cytogenetics Laboratory Reporting Instructions I. INTRODUCTION This manual provides detailed instructions on the proper reporting of diagnosed birth defects by cytogenetics laboratories. A report is required from cytogenetics laboratories whenever a reportable condition is diagnosed for patients under the age of two years. -
A Narrative Review of Poland's Syndrome
Review Article A narrative review of Poland’s syndrome: theories of its genesis, evolution and its diagnosis and treatment Eman Awadh Abduladheem Hashim1,2^, Bin Huey Quek1,3,4^, Suresh Chandran1,3,4,5^ 1Department of Neonatology, KK Women’s and Children’s Hospital, Singapore, Singapore; 2Department of Neonatology, Salmanya Medical Complex, Manama, Kingdom of Bahrain; 3Department of Neonatology, Duke-NUS Medical School, Singapore, Singapore; 4Department of Neonatology, NUS Yong Loo Lin School of Medicine, Singapore, Singapore; 5Department of Neonatology, NTU Lee Kong Chian School of Medicine, Singapore, Singapore Contributions: (I) Conception and design: EAA Hashim, S Chandran; (II) Administrative support: S Chandran, BH Quek; (III) Provision of study materials: EAA Hashim, S Chandran; (IV) Collection and assembly: All authors; (V) Data analysis and interpretation: BH Quek, S Chandran; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. Correspondence to: A/Prof. Suresh Chandran. Senior Consultant, Department of Neonatology, KK Women’s and Children’s Hospital, Singapore 229899, Singapore. Email: [email protected]. Abstract: Poland’s syndrome (PS) is a rare musculoskeletal congenital anomaly with a wide spectrum of presentations. It is typically characterized by hypoplasia or aplasia of pectoral muscles, mammary hypoplasia and variably associated ipsilateral limb anomalies. Limb defects can vary in severity, ranging from syndactyly to phocomelia. Most cases are sporadic but familial cases with intrafamilial variability have been reported. Several theories have been proposed regarding the genesis of PS. Vascular disruption theory, “the subclavian artery supply disruption sequence” (SASDS) remains the most accepted pathogenic mechanism. Clinical presentations can vary in severity from syndactyly to phocomelia in the limbs and in the thorax, rib defects to severe chest wall anomalies with impaired lung function. -
CONGENITAL ABNORMALITIES of the CENTRAL NERVOUS SYSTEM Christopher Verity, Helen Firth, Charles Ffrench-Constant *I3
J Neurol Neurosurg Psychiatry: first published as 10.1136/jnnp.74.suppl_1.i3 on 1 March 2003. Downloaded from CONGENITAL ABNORMALITIES OF THE CENTRAL NERVOUS SYSTEM Christopher Verity, Helen Firth, Charles ffrench-Constant *i3 J Neurol Neurosurg Psychiatry 2003;74(Suppl I):i3–i8 dvances in genetics and molecular biology have led to a better understanding of the control of central nervous system (CNS) development. It is possible to classify CNS abnormalities Aaccording to the developmental stages at which they occur, as is shown below. The careful assessment of patients with these abnormalities is important in order to provide an accurate prog- nosis and genetic counselling. c NORMAL DEVELOPMENT OF THE CNS Before we review the various abnormalities that can affect the CNS, a brief overview of the normal development of the CNS is appropriate. c Induction—After development of the three cell layers of the early embryo (ectoderm, mesoderm, and endoderm), the underlying mesoderm (the “inducer”) sends signals to a region of the ecto- derm (the “induced tissue”), instructing it to develop into neural tissue. c Neural tube formation—The neural ectoderm folds to form a tube, which runs for most of the length of the embryo. c Regionalisation and specification—Specification of different regions and individual cells within the neural tube occurs in both the rostral/caudal and dorsal/ventral axis. The three basic regions of copyright. the CNS (forebrain, midbrain, and hindbrain) develop at the rostral end of the tube, with the spinal cord more caudally. Within the developing spinal cord specification of the different popu- lations of neural precursors (neural crest, sensory neurones, interneurones, glial cells, and motor neurones) is observed in progressively more ventral locations. -
Blueprint Genetics Craniosynostosis Panel
Craniosynostosis Panel Test code: MA2901 Is a 38 gene panel that includes assessment of non-coding variants. Is ideal for patients with craniosynostosis. About Craniosynostosis Craniosynostosis is defined as the premature fusion of one or more cranial sutures leading to secondary distortion of skull shape. It may result from a primary defect of ossification (primary craniosynostosis) or, more commonly, from a failure of brain growth (secondary craniosynostosis). Premature closure of the sutures (fibrous joints) causes the pressure inside of the head to increase and the skull or facial bones to change from a normal, symmetrical appearance resulting in skull deformities with a variable presentation. Craniosynostosis may occur in an isolated setting or as part of a syndrome with a variety of inheritance patterns and reccurrence risks. Craniosynostosis occurs in 1/2,200 live births. Availability 4 weeks Gene Set Description Genes in the Craniosynostosis Panel and their clinical significance Gene Associated phenotypes Inheritance ClinVar HGMD ALPL Odontohypophosphatasia, Hypophosphatasia perinatal lethal, AD/AR 78 291 infantile, juvenile and adult forms ALX3 Frontonasal dysplasia type 1 AR 8 8 ALX4 Frontonasal dysplasia type 2, Parietal foramina AD/AR 15 24 BMP4 Microphthalmia, syndromic, Orofacial cleft AD 8 39 CDC45 Meier-Gorlin syndrome 7 AR 10 19 EDNRB Hirschsprung disease, ABCD syndrome, Waardenburg syndrome AD/AR 12 66 EFNB1 Craniofrontonasal dysplasia XL 28 116 ERF Craniosynostosis 4 AD 17 16 ESCO2 SC phocomelia syndrome, Roberts syndrome -
Classification of Congenital Abnormalities of the CNS
315 Classification of Congenital Abnormalities of the CNS M. S. van der Knaap1 A classification of congenital cerebral, cerebellar, and spinal malformations is pre J . Valk2 sented with a view to its practical application in neuroradiology. The classification is based on the MR appearance of the morphologic abnormalities, arranged according to the embryologic time the derangement occurred. The normal embryology of the brain is briefly reviewed, and comments are made to explain the classification. MR images illustrating each subset of abnormalities are presented. During the last few years, MR imaging has proved to be a diagnostic tool of major importance in children with congenital malformations of the eNS [1]. The excellent gray fwhite-matter differentiation and multi planar imaging capabilities of MR allow a systematic analysis of the condition of the brain in infants and children. This is of interest for estimating prognosis and for genetic counseling. A classification is needed to serve as a guide to the great diversity of morphologic abnormalities and to make the acquired data useful. Such a system facilitates encoding, storage, and computer processing of data. We present a practical classification of congenital cerebral , cerebellar, and spinal malformations. Our classification is based on the morphologic abnormalities shown by MR and on the time at which the derangement of neural development occurred. A classification based on etiology is not as valuable because the various presumed causes rarely lead to a specific pattern of malformations. The abnor malities reflect the time the noxious agent interfered with neural development, rather than the nature of the noxious agent. The vulnerability of the various structures to adverse agents is greatest during the period of most active growth and development. -
16P11.2 Deletion and Duplication: Characterizing Neurologic Phenotypes in a Large Clinically Ascertained Cohort Kyle J
ORIGINAL ARTICLE 16p11.2 Deletion and Duplication: Characterizing Neurologic Phenotypes in a Large Clinically Ascertained Cohort Kyle J. Steinman,1* Sarah J. Spence,2 Melissa B. Ramocki,3 Monica B. Proud,4 Sudha K. Kessler,5 Elysa J. Marco,6 LeeAnne Green Snyder,7 Debra D’Angelo,8 Qixuan Chen,8 Wendy K. Chung,9 and Elliott H. Sherr,6 on behalf of the Simons VIP Consortium 1University of Washington and Seattle Children’s Research Institute, Seattle, Washington 2Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts 3University Otolaryngology, Providence, Rhode Island 4Baylor College of Medicine, Houston, Texas 5Children’s Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania 6University of California, San Francisco, San Francisco, California 7Clinical Research Associates, New York, New York 8Mailman School of Public Health, Columbia University, New York, New York 9Columbia University Medical Center, New York, New York Manuscript Received: 12 August 2015; Manuscript Accepted: 13 June 2016 Chromosome 16p11.2 deletions and duplications are among the most frequent genetic etiologies of autism spectrum How to Cite this Article: disorder (ASD) and other neurodevelopmental disorders, Steinman KJ, Spence SJ, Ramocki MB, but detailed descriptions of their neurologic phenotypes Proud MB, Kessler SK, Marco EJ, Green have not yet been completed. We utilized standardized ex- Snyder LA, D’Angelo D, Chen Q, Chung amination and history methods to characterize a neurologic WK, Sherr EH, on behalf of the Simons phenotype in 136 carriers of 16p11.2 deletion and 110 carriers VIP Consortium. 2016. 16p11.2 Deletion of 16p11.2 duplication—the largest cohort to date of uni- and Duplication: Characterizing neurologic formly and comprehensively characterized individuals with phenotypes in a large clinically ascertained the same 16p copy number variants (CNVs). -
Anaesthesia for Chest Wall Reconstruction in a Patient with Poland Syndrome: CARE- Compliant Case Report and Literature Review
Anaesthesia for chest wall reconstruction in a patient with Poland syndrome: CARE- compliant case report and literature review The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Gui, Lingli, Shiqian Shen, and Wei Mei. 2018. “Anaesthesia for chest wall reconstruction in a patient with Poland syndrome: CARE- compliant case report and literature review.” BMC Anesthesiology 18 (1): 57. doi:10.1186/s12871-018-0518-4. http://dx.doi.org/10.1186/ s12871-018-0518-4. Published Version doi:10.1186/s12871-018-0518-4 Citable link http://nrs.harvard.edu/urn-3:HUL.InstRepos:37160167 Terms of Use This article was downloaded from Harvard University’s DASH repository, and is made available under the terms and conditions applicable to Other Posted Material, as set forth at http:// nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of- use#LAA Gui et al. BMC Anesthesiology (2018) 18:57 https://doi.org/10.1186/s12871-018-0518-4 CASEREPORT Open Access Anaesthesia for chest wall reconstruction in a patient with Poland syndrome: CARE- compliant case report and literature review Lingli Gui1, Shiqian Shen2 and Wei Mei1* Abstract Background: Poland syndrome is a rare congenital disease, characterized by agenesis/hypoplasia of the pectoralis major muscle, usually associated with variable thoracic anomalies that needed chest wall reconstruction under general anesthesia. Anaesthetic management in Poland syndrome has scarcely been described. Case presentation: Here, we present our anaesthetic management of Nuss procedure for chest wall correction in a 5 years old patient with Poland syndrome. -
Chapter 1 Cellular Reaction to Injury 3
Schneider_CH01-001-016.qxd 5/1/08 10:52 AM Page 1 chapter Cellular Reaction 1 to Injury I. ADAPTATION TO ENVIRONMENTAL STRESS A. Hypertrophy 1. Hypertrophy is an increase in the size of an organ or tissue due to an increase in the size of cells. 2. Other characteristics include an increase in protein synthesis and an increase in the size or number of intracellular organelles. 3. A cellular adaptation to increased workload results in hypertrophy, as exemplified by the increase in skeletal muscle mass associated with exercise and the enlargement of the left ventricle in hypertensive heart disease. B. Hyperplasia 1. Hyperplasia is an increase in the size of an organ or tissue caused by an increase in the number of cells. 2. It is exemplified by glandular proliferation in the breast during pregnancy. 3. In some cases, hyperplasia occurs together with hypertrophy. During pregnancy, uterine enlargement is caused by both hypertrophy and hyperplasia of the smooth muscle cells in the uterus. C. Aplasia 1. Aplasia is a failure of cell production. 2. During fetal development, aplasia results in agenesis, or absence of an organ due to failure of production. 3. Later in life, it can be caused by permanent loss of precursor cells in proliferative tissues, such as the bone marrow. D. Hypoplasia 1. Hypoplasia is a decrease in cell production that is less extreme than in aplasia. 2. It is seen in the partial lack of growth and maturation of gonadal structures in Turner syndrome and Klinefelter syndrome. E. Atrophy 1. Atrophy is a decrease in the size of an organ or tissue and results from a decrease in the mass of preexisting cells (Figure 1-1).