Killian-Jamieson diverticulum
A Killian-Jamieson diverticulum is a true diverticulum. It is located just below the cricopharyngeal muscle, anteriorly and laterally, as a left sided or less commonly bilateral out pouchings from the cervical oesophagus. It is an infrequently encountered compared with Zenker's diverticulum. Not only are they smaller than Zenker's diverticulum (usually < 1.5 cm), but they also are rarely symptomatic.

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