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Figure 3: False negatives and false positives with NBI. (a) WLE revealing a large submucosal bulge in the supraglottis and on (b) NBI, no IPCL patterns were noted except for increased vasculature. Biopsy revealed Adenoid Cystic Carcinoma. (c) WLE view of papillomas and on (d) NBI type Va pattern was noted with biospy suggestive of benign papillomas

Figure 3: False negatives and false positives with NBI. (a) WLE revealing a large submucosal bulge in the supraglottis and on (b) NBI, no IPCL patterns were noted except for increased vasculature. Biopsy revealed Adenoid Cystic Carcinoma. (c) WLE view of papillomas and on (d) NBI type Va pattern was noted with biospy suggestive of benign papillomas