CD151 and neoplasm: In particular, cluster of differentiation 15119–23 (CD151; Fig. S1), also known as PETA-3 or SFA-1, is a 30 kD tetraspanin receptor that is widely expressed in normal cells and tissues (e.g., epithelium, endothelium, cardiac muscle, dendritic cells, and hematopoietic cells)24, and overexpressed in diverse tumor tissues (e.g., lung, colon, prostate, pancreas, breast, and skin)25–27.