A comparison with histologic parameters and PD-L1 status revealed significantly higher rates of CTLA-4+ cells in tumors with low pT category (p < 0.0001), absent lymph node metastases (p = 0.0031), and PD-L1 expression in tumor cells or inflammatory cells (p < 0.0001 each; Table 2). Here, CTLA4 is linked to neoplasm.