A novel technique of ultrasound-guided glossopharyngeal nerve block to relieve cancer pain

High-frequency ultrasound probe (6–15 MHz) was kept with its medial tip on lateral cornu of hyoid bone in transverse plane, and then the lateral tip of probe was rotated toward angle of mandible. [3] We refrained from using neurolytic agents such as alcohol or phenol because of its potential side effects on adjacent structures with a potential risk of pharyngeal perforation. Declaration of patient consent The authors certify that they have obtained all appropriate patient consent forms.