The T cells isolated here not only specifically recognised peptide-pulsed or antigen-transfected cells in the context of HLA-A*0201, but also released granzyme B when recognising HLA-A*0201+ ET expressing the antigen, while other HLA-A*0201+ tumour lines and HLA-A*0201 negative ET were not affected. This evidence concerns the gene GZMB and neoplasm.