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Fig. 7. —67-year-old man with peptic stricture that was judged to be equivocal by observers. Left posterior oblique double-contrast esophagogram obtained with patient upright shows that stricture (white arrow) in distal esophagus has some benign features with tapered distal margins and some malignant features with abrupt proximal margins (black arrows) and marked asymmetry. Endoscopy (not shown) revealed benign peptic stricture in distal esophagus, and endoscopic biopsy specimens revealed Barrett's esophagus without evidence of tumor.