The Killian-Jamieson space is below the cricopharyngeus muscle and lateral to the longitudinal muscle of the esophagus. This muscular gap is the location of the rarer Killian-Jamieson diverticulum. Fluoroscopy will show an outpouching along the anterolateral esophagus inferior to the cricopharyngeus muscle (as opposed to along the posterior esophagus and superior to the cricopharyngeus muscle in the case of a Zenker's diverticulum).
REFERENCES
Rubesin SE and Levine MS. Killian-Jamieson diverticula. AJR Am J Roentgenol 2001;177:85-9.
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