These biomarkers included immunohistochemical molecular protein measurements of resected PT for cell proliferation (Ki67) and blood vessel (CD31) markers in resected PTs (Fig 4A; example shown), blood-based cellular measurements of circulating myeloid-derived stromal cells (MDSCs) (Fig 4B), and circulating tumor cells (CTCs) from 66 animals (Fig 4C). The gene discussed is PECAM1; the disease is neoplasm.