CD4 and polyp: Higher percentages of iNKT subsets, including CD4+ iNKT cells (1.95-fold), HLA-DR+ iNKT cells (1.48-fold), and PD-1+ iNKT cells (1.47-fold), were also observed in polyp tissues than in control mucosa (Figure 1E); moreover, HLA-DR+PD-1+ iNKT cells were also elevated (1.69-fold) in polyp samples (Figure 1E).