Zenker's diverticulum is a pouch at the back of the throat, above the cricopharyngeal muscle(where the pharynx and esophagus join). This muscle can malfunction (fail to relax or open easily), resulting in an out-pouching of the posterior wall of the pharynx, just above the esophagus. Food and saliva will accumulate in the pouch over time and the pouch will grow in size.
By Farzaneh Banki, M.D.
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