Abstract
Understanding the three-dimensional (3D) movement of immobile vocal folds (VFs) is very important. Because endoscopic findings reflect only the two-dimensional movement of VFs, it is impossible to obtain a correct diagnosis. The cases presented in this article include not only those of unilateral vocal fold paralysis (UVFP) but also arytenoid dislocation, laryngeal scarring and other statuses. The main diseases are described below.
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