PECAM1 and neoplasm: Second, tumor subsets enriched for microenvironment features, including hypoxia markers (e.g., Slc2a1, Pdk1, Car9), extracellular matrix (ECM) genes (e.g., Matn2, Fn1, Dcn, Col6a1), vasculature (e.g., Cdh5, Pecam1, Vwf), and interferon response genes (e.g., Rsad2, Ifit3, Gbp3, Cxcl10, Cd274).