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Magnification ×400, 0.19 mm2 area, immunostaining with the anti-tryptase antibody. (A) High MCDPT in primary PDAT section. Small arrows indicate single red-immunostained MCs. The big arrow indicates tumour epithelium. (B) Low MCDPT in ANT section. The small arrow indicates just one red-stained MC. Big arrows indicate normal pancreatic epithelium. Scale bar corresponds to 125 µm. MCDPT, density of mast cells positive for tryptase.
