PLXNB2 and neoplasm: Among them, a putative 170 kDa cell surface protein was earlier proposed [92], which recently has been identified as Plexin-B2 in a variety of tumor and non-tumor cells as well as normal and malignant stem and progenitor cells [93] and, also, as epidermal growth factor receptor (EGFR) in pancreatic cancer cells [94].