Introduction With the introduction of new and improved roentgenographic techniques radiography has become an important method for the diagnosis and management of laryngeal disease. Knowledge of the precise location and extent of disease is essential for the determination of the type of treatment most likely to conserve maximum function for the longest period of time. Endoscopy yields data of great importance, but may be deficient in the evaluation of certain areas of the larynx that are not readily accessible to either indirect or direct visualization. It has been found that roentgenological exploration frequently permits good assessment of the degree of involvement in these areas. They are: (1) base of epiglottis (inferior border of the vestibule); (2) subglottic region; (3) thyroid cartilage; (4) preepiglottic space, and (5) laryngeal ventricles. Visualization may be hampered also by secondary changes in the tissues resulting from previous surgery or radiotherapy, projecting polypoid masses, edema of