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Representative figure (H&E) of primary neuroendocrine tumor of kidney: PNRT with trabecular appearance (A) and solid (B). Synaptophysin (C) and MIB1 (D) in a PNRT with liver metastasis and high mitotic index (5%) (A-D: original magnification ×20). Abbreviation: H&E, hematoxylin and eosin.
