Source:http://linkedlifedata.com/resource/umls/id/C0003564
MSH: Complete loss of phonation due to organic disease of the larynx or to nonorganic (i.e., psychogenic) causes.,NCI: A term referring to the inability to speak. It may result from injuries to the vocal cords or may be functional (psychogenic).,NCI: A disorder characterized by the inability to speak. It may result from injuries to the vocal cords or may be functional (psychogenic).