We previously showed that CD4+ and double-negative (CD3+ ‘DN’, CD4−CD8−) T cells among TILs derived from patient PanTT26 (annotated as Panc17 in our previous publication16) are able to produce IL-2 and IL-17, while CD8+ T cells do not produce cytokines after 6 h of stimulation with autologous tumour cells.16 In addition, we also observed that PanTT26 TILs could kill autologous tumour cells within 4 h of culture initiation, using a standard Cr51-release assay. The gene discussed is CD4; the disease is neoplasm.