Vocal cord paralysis – Diagnosis and treatment – Mayo Clinic

Paralysis of the nerve to your vocal cord will probably leave the vocal cord muscle thin and weak. To add bulk to a paralyzed vocal cord, a doctor who specializes in disorders of the larynx (laryngologist) may inject your vocal cord with a substance such as body fat, collagen or another approved filler substance.

https://www.mayoclinic.org/diseases-conditions/vocal-cord-paralysis/diagnosis-treatment/drc-20378878