Plain roentgenography in the evaluation of unilateral vocal cord mobility.

Despite the availability of many methods for the structural and functional evaluation of the larynx, this study suggests that plain roentgenographic techniques are simple and effective means of providing diagnostic and prognostic data useful in the management of hemilaryngeal dysfunction. Lateral soft tissue and anteroposterior views of the neck can demonstrate unilateral vocal cord dysfunction within a few hours after onset. Complete recovery of vocal cord function is most likely to occur when hemilaryngeal dysfunction is not associated with the appearance of a distended ventricle on the lateral soft tissue roentgenogram of the neck. Conversely, when the distended ventricle assumes a delta or Y configuration, it is unlikely that the hemilarynx will resume its normal mobility. Laryngeal immobility lasting more than six months is usually irreversible.