Figure 1

Figure 1: (a) Percentage of CD4⁺CD25^interCD127^low/-(CD25^inter) and CD4⁺CD25^highCD127^low/-(CD25^high) Tregs in the tumour/ node microenvironment and peripheral circulation of HNSCC patients (*p <0.001). (b) Percentage of CD25inter and CD25^high Tregs from patients with tumours arising from different HNSCC subsites (laryngeal and oropharyngeal) in the tumour/node microenvironment and peripheral circulation (*p <0.001; **p =0.01; ***p =0.04).