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Endoscopic findings of lymph node metastasis (LNM) case-1. a, b White light and narrow-band imaging showed 0 – IIa in the left pyriform sinus of the hypopharynx. Endoscopic mucosal resection (EMR) was performed for this lesion. c Histopathological examination revealed subepithelial invasive cancer (3500 μm), with ly1, v1.
