الفهرس 
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Abstract
In order to diagnose the accurate extension of a laryngeal mass, we conducted this study to clarify the role of office-based endoscopy and direct laryngoscopy compared with computed tomography in the assessment of topographic extension of laryngeal malignant neoplasms.
Aim:
To clarify the role of office-based endoscopy and direct laryngoscopy compared with computed tomography in the assessment of topographic extension of laryngeal malignant neoplasms.
Study Design:
This study is of the descriptive, procedural, cross-sectional type.
Patients and Methods: 34 patients with suspected laryngeal cancer were conducted in this study, all patients were subjected to a diagnostic workup including indirect laryngoscopy, CT of the neck (with contrast), and direct laryngoscopy under general anasthenisa with a checklist for the anatomical subsites checked during assessment.
Results: Accuracy percentage regarding CT was 48% in patients with suspected glottis lesions, and 55.6% in patients with suspected supraglottic lesions. Accuracy of clinical and microlaryngoscopic examination accuracy results of evaluation of glottal and supraglottal suspicious lesions. For all T stages and for glottic lesions, accuracy level was found 92% accuracy, and with minor under-estimation 4% and major under-estimation 4%. In glottic lesions, there is lower sensitivity of 59.1% and lower specificity (8.3%), the lower sensitivity is due to presence of 9 patients considered as false –ve , while the very low specificity (8.9%) is due to the presence of 11 patients (32.35%) false positive.
Conclusion: Direct laryngosocpy and office based endoscopy showed very close results as regards assessment of the extension and detection of early stages of malignant neoplasms, Computed topography showed less sensitivity and specificity in the assessment of malignant laryngeal neoplasm, particularly in detection of early glottic lesions.