PECAM1 and colonic neoplasm: Besides PD-L1 and HER2 [9,25], endothelial-to-mesenchymal transition (EndoMT) [5,45]-relevant mesenchymal vimentin+/CD31+ necrotic CTECs and viable CD31− CTCs in colon cancer patients subjected to therapy were also well co-detected (data not shown due to the authority committee’s ethical code processing amid the pandemic).