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(A) (160X original magnification) and (B) (250X original magnification): concomitant lymph node metastases. (C) (250X original magnification) and (D) (250X original magnification): metachronous lymph node metastases. Tissues were stained for HER-3 expression using MP-RM-1 antibody. Black arrows indicate MP-RM-1 membrane reactivity.
