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A case of early gastric cancer that could not be discriminated by the AFI. (A) Conventional WLE revealed an ill-defined, slightly depressed lesion on the anterior aspect of the gastric antrum, which histology revealed to be a well-differentiated adenocarcinoma. (B) In AFI, the color of the depressed area could not be discriminated from the surrounding mucosa, with the entire gastric mucosa appearing as a mixed surface of purple and green.
