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Stage distribution of the 14th Japanese Gastric Cancer Association (JGCA) and the new 15th JGCA classifications. A, The greatest change in the 15th edition of JGCA staging systems for gastric cancer was the separate inclusion of N3a and N3b. B, In the new 15th JGCA classification, T1‐T3 disease was upstaged with N3b, T4aN3a was downstaged from IIIC to IIIB and T4bN0 and T4aN2 were downstaged from IIIB to IIIA
