CD68 and head and neck squamous cell carcinoma: In the intra-tumoral compartment, a high number of CD68+ cells (>32) was statistically associated with a poorer prognosis in terms of RFS (log-rank test, p = 0.001) (Figure 1A) and OS of patients with HNSCC (log-rank test, p = 0.01) (Figure 1B).