Endoscopic Image of Hourglass Stomach. Hourglass Stomach a stomach more or less completely and permanently divided into two parts, so that it resembles an hourglass in shape; the deformity is due to scarring which complicates gastric ulcer or neoplasia. A deformity of the stomach in which the ‘waist’ is constricted by fibrosis caused by a chronic peptic ulcer, producing an upper and a lower cavity separated by a narrow channel.
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