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Japanese Research Society for Gastric Cancer classification

    • To classify earl and advanced gastric cancer based on endoscopic appearance
    • When there is a combination of types of early gastric cancer, the type that occupies the largest area should be described first
    • In the case where the lesion has twice the thickness of normal mucosa it should be typed 0-1
    • If it has less than twice the thickness of normal mucosa, it should be typed 0-IIa