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Cox-1 expression in primary pancreatic tissues by immunohistochemistry:
(A) and (B): Cancers cells lacking Cox-1 labeling, with labeling in cancer associated fibroblasts (CAFs) and lymphocytes. (C). A cancer with Cox-1 labeling both in cancer cells and in CAFs. D. Normal pancreatic ductal epithelial cells do not show labeling with Cox-1 apart from a few strongly positive ductal endocrine cells (20× magnification).
