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Significance of short-segment Barrett's esophagus.

Barrett's esophagus can progress to dysplasia and adenocarcinoma. Although the incidence of adenocarcinoma of the gastroesophageal junction has increased suddenly in the United States and Europe, we do not know how much of this increase is related to Barrett's esophagus. Interest in mucosal cell abnormalities at the gastroesophageal junction has led researchers to re-examine short-segment Barrett's esophagus. In this recently described condition, specialized columnar epithelium is found in the distal 2 to 3 cm of the esophagus, yet it is not clear how it relates to conventional long-segment Barrett's esophagus, in which the metaplastic epithelium extends higher than 2 to 3 cm above the squamocolumnar junction. The reported prevalence of short-segment Barrett's esophagus found on diagnostic endoscopy varies from 8% to 32%. This wide variation would be lessened by standardized location of biopsy specimens and of endoscopic and histologic staining techniques. Based on the information available, it is apparent that the age range and sex ratios are similar. Although reflux symptoms may be more common in short-segment Barrett's esophagus, disturbances in esophageal motility are less severe and there is less reflux as measured by continuous pH monitoring. Furthermore, recognized complications of Barrett's esophagus, such as ulceration, stricture, high-grade dysplasia, and adenocarcinoma, appear to be uncommon in short-segment Barrett's esophagus.

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