PECAM1 and cancer: Seven types of cells were mainly identified, including cancer cells (CDH1, EPCAM, CDKN2A), endothelial cells (EGGL7, EMCN, PECAM1), endometrial stromal cells (SUSD2), fibroblasts (COL1A2, APOD), lymphocytes (CD28A, CD27, PRF1), macrophages (CD163, FCG2A), and smooth muscle cells (ACTG2) (Fig. 4H‒N).