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In vivo images of the left vocal cord acquired with a rigid laryngoscope using A the laryngoscope and B NIR as the light source. The tumor was observed on the left membranous vocal fold (A). The tumor delineation (arrow heads) was confirmed by NIR transillumination (B). C Pathological examination indicative of a localized tumor of left vocal cord. The tumor was localized with vocalis muscle with clear margination (stain, hematoxylin and eosin; magnification, × 10)
