PECAM1 and skin basal cell carcinoma: Compared with the ER+BCC-NAF organoid co-cultures, the tumor-associated CD45+CD31+ cells secrete 5.7 ± 0.48-fold more IL1β, 1.5 ± 2-fold CCL7, 1.2 ± 0.2-fold IL6, and 1.1 ± 0.02-fold IL8 (Figure 7A and Table S3).