Inclusion Criteria:  Subject is diagnosed with unilateral vocal cord paralysis in paramedian position or 3 months lateral onset without movement and mucosal waves of the vocal cords on videostroboscopy. Willing to give consent  Exclusion Criteria:  Has a history of malignancy of the larynx or lung Subject isn't able to undergo injection laryngoplasty procedure under general anesthesia Subject with thrombositopenia