236264.fig.004a
(a)
236264.fig.004b
(b)
Figure 4: Endoscopic views of the Lugol chromoendoscopy in patients with head and neck cancer. (a) Irregularly shaped multiform LVLs (histologically identified as spinocelullar carcinoma). (b) Single LVL on 7 o’clock position (histologically high-grade dysplasia).