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Vocal fold paralysis is the result of nerve damage and includes the causes of cerebrovascular accident (stroke), trauma, or virus. A person can exhibit a bilateral or unilateral paralysis. The paralysis may be temporary or permanent depending on the site and extent of the lesion. A paralysis in a more adducted (closed) position may spare the voice or only result in mild hoarseness. A paralysis in an abducted (open) position will result in a significantly breathy/hoarse voice due to an inability to close the vocal folds. A person may be at risk for aspiration of liquids and/or solids with this type of impairment. A surgery called medialization thyroplasty is available to improve vocal fold closure to protect the airway and improve the voice.
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