Treg phenotype Primary tumour tissue (n=4) Tumour associated lymph node (n=15) p value
CD25inter 18.7 ± 1.7 16.9 ± 1.2 0.97
CD25high 21.2 ± 7.1 19.1 ± 2.0 0.65
Mean percentage ± SEM
Table 2: Frequency ofTregs in the tumour microenvironment of HNSCC patients.