Chromoendoscopy and magnifying endoscopy are useful for detection and recognition of small non polypoid lesions, for differential diagnosis between hyperplastic and adenomatous lesions and for determining not only the lateral extent but also the depth of a lesion. Pit analysis would especially be useful in the differential diagnosis between depressed-type early cancers (type IIIS) and flat adenomas with pseudodepression (type IIIL).
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