TEK and neoplasm: To gain a deeper understanding of how TEK may alter brain vasculature development and lead to pathology, we examined TEK expression in two scRNA-seq atlases comprising 212,214 unsorted vascular and perivascular cells and 243,521 FACS-sorted endothelial cells from fetal, adult, AVM, and tumor tissue samples [17] (Figure 2A and Figure 3A,B).