Fig. 1

H&E and neuroendocrine markers expression in NEN tumors categories. A NETG1 H&E (×20); B positive CgA expression in NETG1 (20×); C positive Syn expression in NETG1; D NETG2 H&E; E positive CgA expression in NETG2(×20); F positive Syn expression in NETG2 (×20); G NECG3 H&E (×20); H positive CgA expression in NECG3 (×20); I positive Syn expression in NECG3(×20); L H&E in MTC (×20); M positive CgA expression in MTC (×20); N positive Calcitonin expression in MTC. Scale bar 100 µm