The double immunofluoresence staining of CD90 (green) and CD31 (red) on pancreatic neuroendocrine tumor (PNET) showed that CD90 largely overlapped with CD31 (Figure S7 in S1 File), indicating that CD90 might be a promising marker for pancreatic neuroendocrine carcinoma. The gene discussed is PECAM1; the disease is pancreatic endocrine carcinoma.