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(A) Expression of HIF-2α (by IHC). (B) VM structure by CD34/PAS double-staining: the yellow arrow indicates endothelial-dependent vessels that are CD34-positive and PAS-positive; the red arrow indicates VM structures that wereCD34-negative and PAS-positive in pancreatic cancer and adjacent non-tumor tissues. Original magnification100× or 400×. The images are representative of three independent experiments. NT: normal tissue; PC: pancreatic cancer.
