Substitute laryngeal voice sources after partial laryngectomies.

The larynx is a highly adjustable organ, preserving at least some of its functions even when severely damaged. Partial surgical excision (trauma) of the larynx creates new anatomical and functional conditions for the production of voice. Depending on the type and extent of the excision, functional closure of the glottis is compromised, usually resulting in a hyperkinetic pattern of voice production. The glottal voice source is jeopardized, which can result in the creation of substitute laryngeal voice sources. Their capacity for voice production is limited, and therefore these mechanisms have considerable clinical significance. In this paper, the incidence of substitute laryngeal voice sources after partial laryngectomies and its clinical implications are analyzed.