Fig. 1
Case 1. a Oropharyngeal fiberscopic image. A tumor was observed in the right anterior wall of the oropharynx (yellow arrow). b Contrast-axial magnetic resonance imaging (MRI) scan of the neck before treatment. An enhanced metastatic tumor was observed in the right internal jugular node (yellow arrow). c Contrast-axial MRI scan of the neck before treatment. An enhanced primary tumor was observed in the right anterior wall of the oropharynx (yellow arrow). d Contrast-coronal MRI scan (yellow arrow)