A method for corrective surgery in a human subject of a vocal cord defect amenable to rectification by the augmentation of tissue subadjacent to the vocal cord defect, the method comprising: injecting an effective amount of autologous in vitro cultured fibroblast cells into the lamina propia, Reinke's space, the lateral tissue or the lateral edge of the vocal cord tissue of the subject in a position subadjacent to the vocal cord defect, wherein the in vitro fibroblast cultured cells are retrieved from the subject.
