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AID immunoreactivity was detected in 10 of 27 specimens (37.0%). The frequency of positivity for AID expression in T1 and T2 cancer was significantly higher than that in T3 and T4 cancer (A). The frequency of positivity for AID expression in N0 cancer tended to be higher than that in N2 and N3 cancer (B). Closed and open boxes represent expression and lack of expression of AID protein, respectively.
