MKI67 and skin basal cell carcinoma: Figure 2 shows that the control group exhibited more Ki67-positive cells than the high and low RCF PRF-treated groups in both cell types, with a more pronounced effect in SCC. There was no significant visual difference observed between cells under high and low RCF PRF treatment in both BCC and SCC cells (Figure 2C,D). The data presented in Figure 2C,D show that the percentage of Ki67-positive cells in the PRF-treated group was significantly lower than in the control group.