REDUPLICATIONS of the stomach are not often reported. The majority reported have been so-called gastrogenic cysts, most of which are attached to the stomach. Lewis and associates reviewed the English literature and found only 38 cases of duplication of the stomach reported in the past 43 years. A series of 68 cases seen over a period of 22 years at Children's Hospital in Boston revealed only 2 involving the stomach. The duplication has the common anatomic characteristic of a wall containing all the normal layers of the stomach—serosa, muscularis, and muscosa.
Duplications may occur at any level of the intestinal tract. The epithelium which lines the duplication always resembles that of some part of the alimentary tract but does not necessarily correspond to the mucosa of that level at which the duplication is found. Presumably a "gastrogenic cyst" could be found at any level of the gastrointestinal tract, but few
Laird GJ. An Unusual Gastric Duplication. JAMA. 1962;180(2):158–159. doi:10.1001/jama.1962.03050150000018
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