title: Laryngeal dystonia: case report and treatment with botulinum toxin.
abstract: Laryngeal dystonia or spasmodic dysphonia is characterized by involuntary and inappropriate spasms of vocal muscles, having the adductor type as the most common one. It is characterized by strain-strangled voice with pitch breaks. Diagnosis is made by means of videolaryngostroboscopic exam. The treatment of choice is done with botulinum toxin directly injected in the muscles responsible for the mismatched movement. The aim of this study is to report on an adductor- type dysphonia patient and to discuss the advantages and observations about this treatment reported in the literature.
authors.affiliation: Faculdade de Medicina, Universidade Federal de Juiz de Fora, and Hospital Servidor Público Estadual de São Paulo, Brazil.
authors.forename: Victor José Barbosa
authors.initials: VJ
authors.lastname: Santos
authors.forename: Fernando Marcos
authors.initials: FM
authors.lastname: Mattioli
authors.forename: Wellerson Marcos
authors.initials: WM
authors.lastname: Mattioli
authors.forename: Renata Jacob
authors.initials: RJ
authors.lastname: Daniel
authors.forename: Vicente Paulo Miranda
authors.initials: VP
authors.lastname: Cruz
mesh_terms: D019274:Botulinum Toxins, Type A / Q000627:therapeutic use*; D004421:Dystonia / Q000150:complications* / Q000175:diagnosis / Q000188:drug therapy; D005260:Female; D006801:Humans; D007821:Laryngeal Muscles / Q000187:drug effects*; D008875:Middle Aged; D009465:Neuromuscular Agents / Q000627:therapeutic use*; D016896:Treatment Outcome; D014832:Voice Disorders / Q000175:diagnosis / Q000188:drug therapy / Q000209:etiology*
chemical_list: D009465:Neuromuscular Agents; D019274:Botulinum Toxins, Type A