Patients who were assessed as having a high infiltration by CD68-IT cells in the tumor were identified only in the group of squamous cell carcinoma (SCC) patients but not among the adenocarcinoma (AC) and adenosquamous carcinoma (ASC) patients (Fisher’s test p < 0.0001), (Table 1, Figure 1A). Here, CD68 is linked to squamous cell carcinoma.