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Linear peptic ulcerations are not uncommon lesions of the stomach and duodenum and can be demonstrated by upper gastrointestinal series. This is facilitated by the double contrast technique, but they may also be appreciated via compression methods. The criteria found helpful to establish the presence of a linear ulcer include: (a) contour deformity; (b) niche projection; (c) fuzzy line; and (d) folds radiating to a line (crater). Routine use of these criteria with the double-contrast method enabled the authors to diagnose 42 linear ulcers.

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