Ki-67 expression within samples from KA patients was mainly localized in the nuclei of basal cells at the initial portions of tumor infiltration, with this expression being observed in the nuclei of only a few basal cells, while in cSCC patients, this Ki-67 expression was localized within the nuclei of most cells in the tumor region (Figure 7(a)). Here, MKI67 is linked to skin squamous cell carcinoma.