However, Ki-67 expression in dogs with benign tumors (median 1 ng/mL, IQR: 0.2–1 ng/mL; p = 0.04) was statistically significantly decreased compared to dogs with carcinoma (median 2 ng/mL, IQR: 1–4.5 ng/mL) and compared to dogs of the group others including dental diseases or sinonasal aspergillosis (median 2.5 ng/mL, IQR: 1.8–3 ng/mL; p = 0.026). This evidence concerns the gene MKI67 and benign neoplasm.