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Computed tomography virtual laryngoscopy: comparison between radiological and otolaryngological evaluations for
Yezdan Firat1, Erdinç Aygenç, Ahmet Kemal Firat
1Department of Otolaryngology, Ankara Numune Training and Research Hospital, Ankara, Turkey. yezdanf@yahoo.com
Objectives:
We evaluated the utility of computed tomography virtual laryngoscopy (CTVL) in identifying endolaryngeal lesions in laryngeal tumors.
Patients And Methods:
Virtual laryngoscopic images were obtained from axial CT scans of 21 patients with known laryngeal carcinoma. Findings from rigid telescopic videolaryngoscopy (RTV) and CTVL images were evaluated and compared with reference to operative records.
Results:
Lesions localized in the base of the tongue, pyriform sinus, aryepiglottic folds, and arytenoids were well visualized by both RTV and CTVL. The two techniques were not found effective in identifying lesions of the ventricular bands, ventricular cavities, and the anterior commissure. Virtual laryngoscopy was superior to RTV in the visualization of the subglottic area and vocal cords.
Conclusion:
Virtual laryngoscopy is a noninvasive and reliable technique that provides visualization of endolaryngeal surfaces and tumor extension. It may be beneficial in staging larynx carcinoma and planning the most appropriate surgical procedure.
