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Fig. 8. —58-year-old man with upper esophageal stricture that was judged to be equivocal by observers. Right posterior oblique double-contrast esophagogram obtained with patient upright shows that stricture (white arrow) in upper esophagus has some benign features with tapered distal margins and smooth contour and some malignant features with abrupt proximal margins (black arrows). Endoscopy (not shown) revealed malignant-appearing stricture in upper esophagus, but endoscopic biopsy specimens could not be obtained because of degree of obstruction. This patient was known to have undergone esophagogastrectomy for esophageal carcinoma; therefore, endoscopic findings were attributed to recurrent or metachronous carcinoma.