PROX1 and neoplasm: A total of 225 high-quality cells from control and 356 from tumor-draining LNs were included in the downstream analysis and their LEC identity could be confirmed by the expressions of endothelial cell markers Cd31 (Pecam1) and VE-cadherin (Cdh5) as well as lymphatic markers Prox1 and Vegfr3 (Flt4) (Figure 1b).