ERBB2 and neoplasm: When rat-neu is a non-self-antigen, making the rat-neu+ tumour highly immunogenic as in WT BALB/c recipient mice, T cells contributed to a more pronounced anti-neu mAb-mediated tumour growth inhibition and eradication of the transplanted tumours than when rat-neu on the tumour is a self-antigen, as in BALB/c-NeuT recipient mice.