Figure 1. Normal three-dimensional computed tomography images of the pharynx and the larynx of a healthy volunteer. (A) The frontal outline is almost symmetric, and pyriform fossae are well developed on both sides (1). The uvula is shown as an incisura of frontal view (2). (B) In the sagittal view, curvature of the tongue base is less and the space behind the epiglottis is wider than those in case 1 (1). (C) The epiglottis is shown clearly, and the vallecula epiglottica (1) and pyriform fossae (2) are recognized on both sides.