Duplications of the alimentary tract have been defined by Ladd and Gross as "spherical or elongated hollow structures which possess a coat of smooth muscle, which are lined by a mucous membrane and which are intimately attached to some portion of the alimentary tract."19 These malformations vary greatly in size, shape, and location. They are believed to be congenital, and they have been found at all levels of the alimentary tract from the base of the tongue to the anus. They are most common in the ileum and relatively rare in the stomach. The mucosa may resemble that of the portion of tract at which the lesion is found, or may resemble the mucosa at any level of the alimentary canal.7,14
Duplications of the stomach, as defined by Mayo, McKee, and Anderson,24 "have the common anatomic characteristics of a wall containing all the normal layers of the
LEWIS PL, HOLDER T, FELDMAN M. Duplication of the Stomach: Report of a Case and Review of the English Literature. Arch Surg. 1961;82(4):634–640. doi:https://doi.org/10.1001/archsurg.1961.01300100148017
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