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Morphological distinctions between GEPNEC and LNEC. (A) SCNEC of PNEC; (B) SCNEC of lung. GEPNEC, gastroenteropancreatic neuroendocrine carcinoma; LNEC, lung NEC; SCNEC, small-cell NEC; PNEC, pancreatic NEC. Hematoxylin-eosin staining, ×400.
