The present invention relates to a method for providing a tumour specific T cell preparation, comprising the steps of: a. selecting tumour-specific T cell clones by: - providing a tumour sample obtained from a patient； - isolating a nucleic acid preparation from the tumour sample in a nucleic acid isolation step； - obtaining a plurality of T cell receptor nucleic acid sequences from the nucleic acid preparation or a plurality of T cell receptor amino acid sequences encoded by the plurality of T cell receptor nucleic acid sequences； - selecting a tumour-specific T cell receptor nucleic acid sequence from the plurality of T cell receptor nucleic acid sequences or a tumour-specific T cell receptor amino acid sequence from the plurality of T cell receptor amino acid sequences in a sequence selection step； b. sorting tumour-specific T cell clones by: - providing a lymphocyte preparation obtained from the patient； - isolating cells that comprise the selected tumour-specific T cell receptor nucleic acid sequence or the selected tumour-specific T cell receptor amino acid sequence from the lymphocyte preparation in an isolation step.
