Figure 11c. Squamous cell carcinoma of the right side of the glottis. (a) Axial CT scan obtained during quiet respiration shows a tumor of the anterior commissure (arrow). (b) Coronal reformatted image obtained during quiet respiration shows the tumor (*). However, the true and false vocal cords are poorly seen, so the local extent of the tumor remains undefined. (c) Volume-rendered image shows the upper airways during quiet respiration. The larynx forms a wide airway indistinguishable from the trachea below. The scalloping of the airway corresponds to the lesion (arrow). (d) Coronal reformatted image obtained during phonation shows the right laryngeal ventricle (arrow). The tumor (*) is located solely below the ventricle; therefore, involvement of the supraglottic structures is ruled out. (e) Volume-rendered laryngogram obtained during phonation shows the right laryngeal ventricle (arrowhead). The subglottic scalloping represents the lower extent of the tumor (arrows).