Fig. 1From: Improved symptomatic, functional, and fluoroscopic outcomes following serial “series of three” double-balloon dilation for cricopharyngeus muscle dysfunctionSpectrum of cricopharyngeus muscle dysfunction showing asymptomatic narrowing of pharyngoesphageal segment to severe narrowing and diverticulum formation. a Non-obstructing bar. b Moderately obstructing bar. c Severely obstructing bar. d Zenker’s diverticulumBack to article page