Linear regression showed a significant association between SMO expression and mitotic count in BCC (R2 = 0.50, slope = 2.97 mitoses per 0.1-OD increase, P = 0.002) but not in SCC (R2 = 0.13, P = 0.22), in SEB (R2 = 0.29, P = 0.06), or in all diagnoses combined (R2 = 0.01, P = 0.57). Here, SMO is linked to skin basal cell carcinoma.