Flow cytometry analysis of tumours revealed high levels of CCR8 expression in a substantial fraction of Foxp3+ CD4+ T cells and a smaller fraction of CD4+ and CD8+ Tconv cells within tumours of tumour‐bearing animals, whereas CCR8 expression within corresponding T cell populations in systemic lymphoid tissues was substantially lower (Figure 1a). This evidence concerns the gene FOXP3 and neoplasm.