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. 2007 Jul 10;97(3):405–411. doi: 10.1038/sj.bjc.6603879

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Copyright © 2007 Cancer Research UK

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Immunohistochemical staining for MK in invasive ductal adenocarcinoma of the pancreas head. (A) Normal pancreatic ductal epithelium dissected approximately 3 cm apart from the cancerous region (× 200). Note that almost all cells are unstained or stained very slightly by the antibody. (B) Carcinoma cells positively stained by MK antibody (× 400). Note cytoplasmic staining for MK. (C) Carcinoma cells stained negatively by MK antibody (× 400).