Fig. 1From: NKX2.2, PDX-1 and CDX-2 as potential biomarkers to differentiate well-differentiated neuroendocrine tumorsNKX2.2 immunoreactivity in endocrine cells of normal stomach (a), duodenum (b), colon (c), appendix (d), and pancreas (e). No NKX2.2 positive cells identified in the gallbladder (f). Original magnification, 400×Back to article page