Expression levels of adhesion molecules and chemokine receptors CD11a (integrin-α L; LFA-1), CD11b (integrin-α M; Mac-1), CD11c (integrin-α X), and CX3CR1 (CX3CL1 receptor) on peripheral blood monocyte subsets from HNSCC patients before and after radio(chemo)therapeutic treatment were analyzed using flow cytometry and compared to healthy donors (Fig. 2). Here, ITGAM is linked to head and neck squamous cell carcinoma.