Pathology of Eosinophilic Fasciitis and Its Relation to Polymyositis Ke-Wei Huang and Xiao-Han Chen
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Microanatomy of Muscles
Microanatomy of Muscles Anatomy & Physiology Class Three Main Muscle Types Objectives: By the end of this presentation you will have the information to: 1. Describe the 3 main types of muscles. 2. Detail the functions of the muscle system. 3. Correctly label the parts of a myocyte (muscle cell) 4. Identify the levels of organization in a skeletal muscle from organ to myosin. 5. Explain how a muscle contracts utilizing the correct terminology of the sliding filament theory. 6. Contrast and compare cardiac and smooth muscle with skeletal muscle. Major Functions: Muscle System 1. Moving the skeletal system and posture. 2. Passing food through the digestive system & constriction of other internal organs. 3. Production of body heat. 4. Pumping the blood throughout the body. 5. Communication - writing and verbal Specialized Cells (Myocytes) ~ Contractile Cells Can shorten along one or more planes because of specialized cell membrane (sarcolemma) and specialized cytoskeleton. Specialized Structures found in Myocytes Sarcolemma: The cell membrane of a muscle cell Transverse tubule: a tubular invagination of the sarcolemma of skeletal or cardiac muscle fibers that surrounds myofibrils; involved in transmitting the action potential from the sarcolemma to the interior of the myofibril. Sarcoplasmic Reticulum: The special type of smooth endoplasmic Myofibrils: reticulum found in smooth and a contractile fibril of skeletal muscle, composed striated muscle fibers whose function mainly of actin and myosin is to store and release calcium ions. Multiple Nuclei (skeletal) & many mitochondria Skeletal Muscle - Microscopic Anatomy A whole skeletal muscle (such as the biceps brachii) is considered an organ of the muscular system. Each organ consists of skeletal muscle tissue, connective tissue, nerve tissue, and blood or vascular tissue. -
Focal Eosinophilic Myositis Presenting with Leg Pain and Tenderness
CASE REPORT Ann Clin Neurophysiol 2020;22(2):125-128 https://doi.org/10.14253/acn.2020.22.2.125 ANNALS OF CLINICAL NEUROPHYSIOLOGY Focal eosinophilic myositis presenting with leg pain and tenderness Jin-Hong Shin1,2, Dae-Seong Kim1,2 1Department of Neurology, Research Institute for Convergence of Biomedical Research, Pusan National University Yangsan Hospital, Yangsan, Korea 2Department of Neurology, Pusan National University School of Medicine, Yangsan, Korea Focal eosinophilic myositis (FEM) is the most limited form of eosinophilic myositis that com- Received: September 11, 2020 monly affects the muscles of the lower leg without systemic manifestations. We report a Revised: September 29, 2020 patient with FEM who was studied by magnetic resonance imaging and muscle biopsy with Accepted: September 29, 2020 a review of the literature. Key words: Myositis; Eosinophils; Magnetic resonance imaging Correspondence to Dae-Seong Kim Eosinophilic myositis (EM) is defined as a group of idiopathic inflammatory myopathies Department of Neurology, Pusan National associated with peripheral and/or intramuscular eosinophilia.1 Focal eosinophilic myositis Univeristy School of Medicine, 20 Geu- mo-ro, Mulgeum-eup, Yangsan 50612, (FEM) is the most limited form of EM and is considered a benign disorder without systemic 2 Korea manifestations. Here, we report a patient with localized leg pain and tenderness who was Tel: +82-55-360-2450 diagnosed as FEM based on laboratory findings, magnetic resonance imaging (MRI), and Fax: +82-55-360-2152 muscle biopsy. E-mail: [email protected] ORCID CASE Jin-Hong Shin https://orcid.org/0000-0002-5174-286X A 26-year-old otherwise healthy man visited our outpatient clinic with leg pain for Dae-Seong Kim 3 months. -
Back-To-Basics: the Intricacies of Muscle Contraction
Back-to- MIOTA Basics: The CONFERENCE OCTOBER 11, Intricacies 2019 CHERI RAMIREZ, MS, of Muscle OTRL Contraction OBJECTIVES: 1.Review the anatomical structure of a skeletal muscle. 2.Review and understand the process and relationship between skeletal muscle contraction with the vital components of the nervous system, endocrine system, and skeletal system. 3.Review the basic similarities and differences between skeletal muscle tissue, smooth muscle tissue, and cardiac muscle tissue. 4.Review the names, locations, origins, and insertions of the skeletal muscles found in the human body. 5.Apply the information learned to enhance clinical practice and understanding of the intricacies and complexity of the skeletal muscle system. 6.Apply the information learned to further educate clients on the importance of skeletal muscle movement, posture, and coordination in the process of rehabilitation, healing, and functional return. 1. Epithelial Four Basic Tissue Categories 2. Muscle 3. Nervous 4. Connective A. Loose Connective B. Bone C. Cartilage D. Blood Introduction There are 3 types of muscle tissue in the muscular system: . Skeletal muscle: Attached to bones of skeleton. Voluntary. Striated. Tubular shape. Cardiac muscle: Makes up most of the wall of the heart. Involuntary. Striated with intercalated discs. Branched shape. Smooth muscle: Found in walls of internal organs and walls of vascular system. Involuntary. Non-striated. Spindle shape. 4 Structure of a Skeletal Muscle Skeletal Muscles: Skeletal muscles are composed of: • Skeletal muscle tissue • Nervous tissue • Blood • Connective tissues 5 Connective Tissue Coverings Connective tissue coverings over skeletal muscles: .Fascia .Tendons .Aponeuroses 6 Fascia: Definition: Layers of dense connective tissue that separates muscle from adjacent muscles, by surrounding each muscle belly. -
A Acanthosis Nigricans, 139 Acquired Ichthyosis, 53, 126, 127, 159 Acute
Index A Anti-EJ, 213, 214, 216 Acanthosis nigricans, 139 Anti-Ferc, 217 Acquired ichthyosis, 53, 126, 127, 159 Antigliadin antibodies, 336 Acute interstitial pneumonia (AIP), 79, 81 Antihistamines, 324 Adenocarcinoma, 115, 116, 151, 173 Anti-histidyl-tRNA-synthetase antibody Adenosine triphosphate (ATP), 229 (Anti-Jo-1), 6, 14, 140, 166, 183, Adhesion molecules, 225–226 213–216 Adrenal gland carcinoma, 115 Anti-histone antibodies (AHA), 174, 217 Age, 30–32, 157–159 Anti-Jo-1 antibody syndrome, 34, 129 Alanine aminotransferase (ALT, ALAT), 16, Anti-Ki-67 antibody, 247 128, 205, 207, 255 Anti-KJ antibodies, 216–217 Alanyl-tRNA synthetase, 216 Anti-KS, 82 Aldolase, 14, 16, 128, 129, 205, 207, 255, 257 Anti-Ku antibodies, 163, 165, 217 Aledronate, 325 Anti-Mas, 217 Algorithm, 256, 259 Anti-Mi-2 Allergic contact dermatitis, 261 antibody syndrome, 11, 129, 215 Alopecia, 62, 199, 290 antibodies, 6, 15, 129, 142, 212 Aluminum hydroxide, 325, 326 Anti-Myo 22/25 antibodies, 217 Alzheimer’s disease-related proteins, 190 Anti-Myosin scintigraphy, 230 Aminoacyl-tRNA synthetases, 151, 166, 182, Antineoplastic agents, 172 212, 215 Antineoplastic medicines, 169 Aminoquinolone antimalarials, 309–310, 323 Antinuclear antibody (ANA), 1, 141, 152, 171, Amyloid, 188–190 172, 174, 213, 217 Amyopathic DM, 6, 9, 29–30, 32–33, 36, 104, Anti-OJ, 213–214, 216 116, 117, 147–153 Anti-p155, 214–215 Amyotrophic lateral sclerosis, 263 Antiphospholipid syndrome (APS), 127, Antisynthetase syndrome, 11, 33–34, 81 130, 219 Anaphylaxi, 316 Anti-PL-7 antibody, 82, 214 Anasarca, -
Muscle Biopsy Features of Idiopathic Inflammatory Myopathies And
Autoimmun Highlights (2014) 5:77–85 DOI 10.1007/s13317-014-0062-2 REVIEW ARTICLE Muscle biopsy features of idiopathic inflammatory myopathies and differential diagnosis Gaetano Vattemi • Massimiliano Mirabella • Valeria Guglielmi • Matteo Lucchini • Giuliano Tomelleri • Anna Ghirardello • Andrea Doria Received: 1 August 2014 / Accepted: 22 August 2014 / Published online: 10 September 2014 Ó Springer International Publishing Switzerland 2014 Abstract The gold standard to characterize idiopathic Keywords Inflammatory myopathy Á Autoimmune inflammatory myopathies is the morphological, immuno- myositis Á Histopathology Á Differential diagnosis histochemical and immunopathological analysis of muscle biopsy. Mononuclear cell infiltrates and muscle fiber necrosis are commonly shared histopathological features. Introduction Inflammatory cells that surround, invade and destroy healthy muscle fibers expressing MHC class I antigen are Idiopathic inflammatory myopathies (IIM) are a heteroge- the typical pathological finding of polymyositis. Perifas- neous group of acquired muscle diseases, which have dis- cicular atrophy and microangiopathy strongly support a tinct clinical, pathological and histological features [1, 2]. diagnosis of dermatomyositis. Randomly distributed The most common IIM seen in clinical practice can be necrotic muscle fibers without mononuclear cell infiltrates separated into four categories including polymyositis (PM), represent the histopathological hallmark of immune-med- dermatomyositis (DM), immune-mediated necrotizing iated necrotizing myopathy; meanwhile, endomysial myopathy (NM) and sporadic inclusion body myositis inflammation and muscle fiber degeneration are the two (sIBM) [1, 3]. main pathological features in sporadic inclusion body In the diagnostic workup of an inflammatory myopathy, myositis. A correct differential diagnosis requires immu- muscle biopsy is an indispensable and sensitive tool for nopathological analysis of the muscle biopsy and has establishing the diagnosis. -
Single-Cell Analysis Uncovers Fibroblast Heterogeneity
ARTICLE https://doi.org/10.1038/s41467-020-17740-1 OPEN Single-cell analysis uncovers fibroblast heterogeneity and criteria for fibroblast and mural cell identification and discrimination ✉ Lars Muhl 1,2 , Guillem Genové 1,2, Stefanos Leptidis 1,2, Jianping Liu 1,2, Liqun He3,4, Giuseppe Mocci1,2, Ying Sun4, Sonja Gustafsson1,2, Byambajav Buyandelger1,2, Indira V. Chivukula1,2, Åsa Segerstolpe1,2,5, Elisabeth Raschperger1,2, Emil M. Hansson1,2, Johan L. M. Björkegren 1,2,6, Xiao-Rong Peng7, ✉ Michael Vanlandewijck1,2,4, Urban Lendahl1,8 & Christer Betsholtz 1,2,4 1234567890():,; Many important cell types in adult vertebrates have a mesenchymal origin, including fibro- blasts and vascular mural cells. Although their biological importance is undisputed, the level of mesenchymal cell heterogeneity within and between organs, while appreciated, has not been analyzed in detail. Here, we compare single-cell transcriptional profiles of fibroblasts and vascular mural cells across four murine muscular organs: heart, skeletal muscle, intestine and bladder. We reveal gene expression signatures that demarcate fibroblasts from mural cells and provide molecular signatures for cell subtype identification. We observe striking inter- and intra-organ heterogeneity amongst the fibroblasts, primarily reflecting differences in the expression of extracellular matrix components. Fibroblast subtypes localize to discrete anatomical positions offering novel predictions about physiological function(s) and regulatory signaling circuits. Our data shed new light on the diversity of poorly defined classes of cells and provide a foundation for improved understanding of their roles in physiological and pathological processes. 1 Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Centre, Blickagången 6, SE-14157 Huddinge, Sweden. -
Nomina Histologica Veterinaria, First Edition
NOMINA HISTOLOGICA VETERINARIA Submitted by the International Committee on Veterinary Histological Nomenclature (ICVHN) to the World Association of Veterinary Anatomists Published on the website of the World Association of Veterinary Anatomists www.wava-amav.org 2017 CONTENTS Introduction i Principles of term construction in N.H.V. iii Cytologia – Cytology 1 Textus epithelialis – Epithelial tissue 10 Textus connectivus – Connective tissue 13 Sanguis et Lympha – Blood and Lymph 17 Textus muscularis – Muscle tissue 19 Textus nervosus – Nerve tissue 20 Splanchnologia – Viscera 23 Systema digestorium – Digestive system 24 Systema respiratorium – Respiratory system 32 Systema urinarium – Urinary system 35 Organa genitalia masculina – Male genital system 38 Organa genitalia feminina – Female genital system 42 Systema endocrinum – Endocrine system 45 Systema cardiovasculare et lymphaticum [Angiologia] – Cardiovascular and lymphatic system 47 Systema nervosum – Nervous system 52 Receptores sensorii et Organa sensuum – Sensory receptors and Sense organs 58 Integumentum – Integument 64 INTRODUCTION The preparations leading to the publication of the present first edition of the Nomina Histologica Veterinaria has a long history spanning more than 50 years. Under the auspices of the World Association of Veterinary Anatomists (W.A.V.A.), the International Committee on Veterinary Anatomical Nomenclature (I.C.V.A.N.) appointed in Giessen, 1965, a Subcommittee on Histology and Embryology which started a working relation with the Subcommittee on Histology of the former International Anatomical Nomenclature Committee. In Mexico City, 1971, this Subcommittee presented a document entitled Nomina Histologica Veterinaria: A Working Draft as a basis for the continued work of the newly-appointed Subcommittee on Histological Nomenclature. This resulted in the editing of the Nomina Histologica Veterinaria: A Working Draft II (Toulouse, 1974), followed by preparations for publication of a Nomina Histologica Veterinaria. -
NEUROLOGY NEUROSURGERY & PSYCHIATRY Editorial
Journal ofNeurology, Neurosurgery, and Psychiatry 1991;54:285-287 285 J Neurol Neurosurg Psychiatry: first published as 10.1136/jnnp.54.4.285 on 1 April 1991. Downloaded from Joural of NEUROLOGY NEUROSURGERY & PSYCHIATRY Editorial The idiopathic inflammatory myopathies and their treatment The inflammatory myopathies are the largest group of As new knowledge has accumulated over the course of acquired myopathies of adult life and may also occur in the last 10 years, it has become increasingly clear that there infancy and childhood. They have in common the presence are distinct pathological and immunological differences of inflammatory infiltrates within skeletal muscle, usually between polymyositis on the one hand and dermato- in association with muscle fibre destruction. They can be myositis on the other, though in some cases there is clearly subdivided into those which are due to known viral, an overlap between the two conditions. In polymyositis bacterial, protozoal or other microbial agents and those in there is usually scattered necrosis of single muscle fibres which no such agent can be identified and in which which appear hyalinised in the early stages and are immunological mechanisms have been implicated.' The subsequently invaded by mononuclear phagocytic cells. latter group includes polymyositis, dermatomyositis and Regenerating fibres are usually seen singly or in small inclusion body myositis. The evidence for an autoimmune groups distributed focally and randomly throughout the aetiology consists of: 1) an association with other auto- muscle. The inflammatory cell infiltrate is predominantly immune diseases; 2) serological tests which reflect an intrafascicular (endomysial) surrounding muscle fibres altered immune state; and 3) the responsiveness of rather than in the interfascicular septa, though perivascular polymyositis and dermatomyositis, if not of the inclusion infiltrates may also be found; the cellular infiltrate consists body variety, to immunotherapy.2 Polymyositis may rarely mainly of lymphocytes, plasma cells and macrophages. -
MODULE 1: HISTOLOGY I an Introduction to Histology; Begin Epithelial Tissue and Connective Tissue
MODULE 1: HISTOLOGY I An Introduction to Histology; Begin Epithelial Tissue and Connective Tissue Histology is the study of the microscopic anatomy of the cells and extracellular matrix that make up the tissues of the body. Using the physical appearance of cells and the matrix that surrounds them, the 10-100 trillion cells of the human body can be grouped into just four major tissue types: epithelial, connective, muscle and nervous tissues. In the Histology Modules of this course, you will learn to identify each of these tissue types as well as their subclasses and important structures. Chemical fixatives are used to preserve tissues when they are harvested. These fixatives are important to preserve the tissue from degradation. These chemicals also destroy the biological function of the cells, so all of the cells in any micrograph images that you see are dead. Biological tissue has little inherent color. In fact, in reality, the tissues that you study would look transparent or have various shades of gray for the most part. However, scientists use staining techniques to help highlight particular features of a tissue. As a student of histology, you should avoid the temptation to memorize tissues based on color. Since it is possible to stain the same tissue with a variety of different colors, you could be easily fooled if you trained yourself to recognize color as the major feature of tissues that you study. The wiser approach would be to carefully learn the shapes and physical characteristics other than color when studying histology. Students who memorize color as the main characteristic to trigger their memory will be disappointed when the exam does not maintain color schemes. -
Connective Tissue 5.2.04
Other Connective Tissue Diseases Chester V. Oddis, MD Thomas A. Medsger, Jr, MD Arthur Weinstein, MD Contents 1. Undifferentiated Connective Tissue Disease 2. Idiopathic Inflammatory Myopathy 3. Scleroderma 4. Sjögren’s Syndrome 5. References OTHER CONNECTIVE TISSUE DISEASES 1 1. Undifferentiated Connective Tissue Disease Table 1 The American College of Rheumatology (ACR) has published criteria for several different diseases Clinical Features and Autoantibody Findings commonly referred to as connective tissue disease Possibly Specific for a Defined CTD (CTD). The primary aim of such classification crite - ria is to ensure the comparability among CTD stud - ies in the scientific community. These diseases Clinical Feature include rheumatoid arthritis (RA), systemic sclero - sis (SSc), systemic lupus erythematosus (SLE), Malar rash polymyositis (PM), dermatomyositis (DM), and Sjögren’s syndrome (SS). These are systemic Subacute cutaneous lupus rheumatic diseases which reflects their inflamma - tory nature and protean clinical manifestations with Sclerodermatous skin changes resultant tissue injury. Although there are unifying immunologic features that pathogenetically tie Heliotrope rash these separate CTDs to each other, the individual disorders often remain clinically and even serologi - Gottron’s papules cally distinct. Immunogenetic data and autoanti - body findings in the different CTDs lend further Erosive arthritis support for their distinctive identity and often serves to subset the individual CTD even further, as seen with the myositis syndromes, SLE and SSc. In other cases, it remains difficult to classify individuals Autoantibody with a combination of signs, symptoms, and labora - tory test results. It is this group of patients that have Anti-dsDNA an “undifferentiated” connective tissue disease (UCTD), or perhaps more accurately, an undifferen - Anti-Sm tiated systemic rheumatic disease. -
MUSCLE TISSUE Larry Johnson Texas A&M University
MUSCLE TISSUE Larry Johnson Texas A&M University Objectives • Histologically identify and functionally characterize each of the 3 types of muscle tissues. • Describe the organization of the sarcomere as seen in light and electron microscopy. • Identify the endomysium, perimysium, and epimysium CT sleeves in muscle. • Relate the functional differences of the three muscle cell types. From: Douglas P. Dohrman and TAMHSC Faculty 2012 Structure and Function of Human Organ Systems, Histology Laboratory Manual MUSCLE FUNCTION: • GENERATION OF CONTRACTILE FORCE DISTINGUISHING FEATURES: • HIGH CONCENTRATION OF CONTRACTILE PROTEINS ACTIN AND MYOSIN ARRANGED EITHER DIFFUSELY IN THE CYTOPLASM (SMOOTH MUSCLE) OR IN REGULAR REPEATING UNITS CALLED SARCOMERES (STRIATED MUSCLES, e.g., CARDIAC AND SKELETAL MUSCLES) MUSCLE • DISTRIBUTION: SKELETAL – STRIATED MUSCLES MOSTLY ASSOCIATED WITH THE SKELETON MUSCLE • DISTRIBUTION: SKELETAL – STRIATED MUSCLES MOSTLY ASSOCIATED WITH THE SKELETON CARDIAC – STRIATED MUSCLES ASSOCIATEWD WITH THE HEART MUSCLE • DISTRIBUTION: SKELETAL – STRIATED MUSCLES MOSTLY ASSOCIATED WITH THE SKELETON CARDIAC – STRIATED MUSCLES ASSOCIATEWD WITH THE HEART SMOOTH – FUSIFORM CELLS ASSOCIATED WITH THE VISCERA, RESPIRATORY TRACT, BLOOD VESSELS, UTERUS, ETC. MUSCLE • HISTOLOGICAL INDENTIFICATION: SKELETAL MUSCLE – VERY LONG CYLINDRICAL STRIATED MUSCLE CELLS WITH MULTIPLE PERIPHERAL NUCLEI MUSCLE • HISTOLOGICAL INDENTIFICATION: SKELETAL MUSCLE – VERY LONG CYLINDRICAL STRIATED MUSCLE CELLS WITH MULTIPLE PERIPHERAL NUCLEI CARDIAC MUSCLE – -
The Editors of the Journal Ofclinical Investigation Gratefully
The Editors ofThe Journal ofClinical Investigation gratefully acknowledge the assistance ofthefollowing reviewers who served during the periodfrom 1 August 1989 through 31 July 1990. Stuart Aaronson Gordon Amidon Lloyd Axelrod Daniel Beauchamp Nanette H. Paul Bormstein Francois M. Claude Amiel Ole Baadsgaard Arthur Beaudet Bishopric Gerry R. Boss Abboud Arthur J. Ammann Bernard M. Babior Daniel Bechard D. Montgomery G. F. Bottazzo Hanna E. Abboud Helmut V. Ammon Robert J. Bache Lewis C. Becker Bissell Elias H. Botvinick George Abela Athanasius Bruce R. Bacon Richard Behringer Mina J. Bissell Claude Bouchard Dana R. Anagnostou David Bader David A. Bell Peter Bitterman Richard C. Abendschein Clark L. Anderson Kamal F. Badr Graeme I. Bell Ingemar Bjorkhem Boucher J. A. Abildskov Donald C. Steinun Norman H. Bell Robert E. Black Andrew J. M. Janis Abkowitz Anderson Baekkeskov William R. Bell William G. Boulton Robert T. Abraham Jeffrey L. Anderson Jacques U. Joseph A. Bellanti Blackard Bonno N. Bouma Dale R. Robert J. Anderson Baenziger Sam Benchimol George L. Daniel Bowen- Abrahamson Sharon Anderson Grover C. Bagby Earl P. Benditt Blackburn Pope Donald I. Abrams Giuseppe Andres Marco Baggiolini William E. Benitz Perry Blackshear Laurence Boxer Christine Abrass Reubin Andres Corrado Baglioni Joel S. Bennett Paul Blake Linda Boxer Naji N. Abumrad Aubie Angel Andrew D. Baines John E. Bennett J. Edwin Blalock Aubrey E. Boyd Hugh Ackerman Harry N. Dorothy Bainton Michael Bennett Rebecca Blanton James L. Boyer Steven Ackerman Antoniades Andrew Baird Vann Bennett Roland C. Blantz Thomas Boyer Brian A. Ackrell Asok C. Antony Robert S. Balaban Neal L. Benowitz Terrence F.