MKI67 and neoplasm: The initial tested cutoff (sEGFR > 31.9 ng/mL) was also not associated with histological grade (Pearson’s χ2: 0.129, p = 0.938), high ki67 (≥14%) levels (Pearson’s χ2: 0.567, p = 0.451), tumour size (Pearson’s χ2: 5.087, p = 0.166), lymph node metastasis (Pearson’s χ2: 4.734, p = 0.192), stage (Pearson’s χ2: 1.109, p = 0.775) nor immunohistochemistry subtype (Pearson’s χ2: 2.086, p = 0.555).