Since the classical work of Zenker and Ziemssen, dividing the esophageal diverticula according to their origin into traction and pressure diverticula, this subject has received contributions of only minor significance; these have taken the form of contentions as to the structure of the pouches or concerning the influence of pressure on the enlargement of pouches already formed by traction, or have been reports of single cases of peculiar nature or origin. These investigators located pouches, originating solely by pressure from within, at the beginning of the esophagus, or at its junction with the pharynx; it often happens that a part of the pharyngeal wall forms part of the pouch. In this region such pressure pouches form in the median line of the posterior wall or slightly to one side, and often attain considerable size. Such diverticula, formed entirely by pressure from within, have rarely been observed in other parts of
EPIBRONCHIAL PRESSURE POUCHES OF THE ESOPHAGUS. JAMA. 1900;XXXV(23):1484. doi:https://doi.org/10.1001/jama.1900.02460490042005
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