Objective: To evaluate the role of narrow band imaging (NBI) in detecting benign nonvascular glottic lesions. Materials and methods:Our study is a retrospective and prospective analysis of 247 patients with suspected benign glottic lesions who presented to our voice clinic over a 6-month duration. Patients were diagnosed on stroboscopy (by the first author) and divided into three groups consisting of leukoplakia, sulci, and cysts. A white light (WL) laryngoscopy and NBI examination was performed by an independent laryngologist (not an author) followed by a comparative analysis. The final gold standard for diagnosis was microlaryngoscopy with or without histopathology. Sensitivity of each modality for diagnosis of the three groups was calculated. Results:The NBI is more sensitive for diagnosing leukoplakia. Stroboscopy is more sensitive for diagnosing sulcus. Conclusion:Small vocal fold lesions may be missed on WL laryngoscopy. Stroboscopy helps in the diagnosis of structural glottic lesions affecting mucosal wave pattern. Many studies have shown that NBI light highlights the vasculature in superficial mucosal and subepithelial layers. This study is an analysis of the value of NBI in detecting relatively avascular glottic lesions, such as leukoplakia, sulci, and cysts. Figs 4A and B: (A) Suspicious bilateral vocal fold cysts (+1) on WL laryngoscopy; and (B) bilateral vocal fold cysts well-defined (+3) in the same patient on NBI light A B

Objectives: To introduce a simple diagnostic test performed with white light laryngoscopy for the diagnosis of sulcus vocalis. Materials and methods:This is a retrospective observational study. A total of 14 patients with voice-related complaints and a phonatory gap on examination were included. Obvious structural and neuromuscular glottic pathologies were excluded. Phonatory gap was measured using white light rigid laryngoscopy with the technique described here. Findings were then correlated with stroboscopy.Results: All 14 patients (10 U/L and 4 B/L), observed to have an asymmetric phonatory gap on white light rigid laryngoscopy, were diagnosed with sulcus vocalis. Conclusion:An asymmetric phonatory gap, as seen on white light laryngoscopy and measured with the simple technique mentioned here, should make the laryngologist suspect a sulcus vocalis. However, the diagnosis needs to be confirmed by stroboscopy.