YI-CHIAN WANGCHUEH-HUNG WUSHAW-GANG SHYUMING-YEN HSIAOTYNG-GUEY WANG2020-11-102020-11-102020-09-051844-4172https://scholars.lib.ntu.edu.tw/handle/123456789/520621Dysphagia associated with the cricopharyngeus muscle (CPm) dysfunction negatively influences the quality of life. This high-pressure region must relax and the lumen must open for smooth food passage. The CP muscle is therefore a common target of chemodenervation with botulinum toxin (BTX). Here we presented a patient with severe left lateral medullary syndrome and non-relaxation of the CPm. We described how to localize the CPm in the transverse and longitudinal views under ultrasonography and offered a video demonstrating ultrasonography-guided BTX injection. Ultrasonography-guided CPm injection with BTX may serve as a reliable, rapid, and effective choice for treatment of cricopharyngeal dysphagia.endysphagia; ultrasound; botulinum toxin; cricopharyngeus; stroke[SDGs]SDG2[SDGs]SDG3botulinum toxin; botulinum toxin A; botulinum toxin; aged; airway obstruction; Article; case report; clinical article; coughing; cricopharyngeus muscle; disease severity; fluoroscopy; human; male; patient referral; prognosis; speech language pathologist; ultrasound; Wallenberg syndrome; diagnostic imaging; dysphagia; interventional ultrasonography; pathophysiology; procedures; treatment outcome; upper esophagus sphincter; Aged; Botulinum Toxins; Deglutition Disorders; Esophageal Sphincter, Upper; Humans; Male; Treatment Outcome; Ultrasonography, Interventional10.11152/mu-209732190858WOS:000566715700016