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(A) Microscopic findings of terminal ileal wall showed tumor emboli infiltrations (arrows) in lamina propria lymphatic spaces, but intact mucosal epithelium (H&E stain, ×100). (B) The tumor cells (arrows) were positive for estrogen receptor; (C) negative for Cdx-2, a critical nuclear transcription factor for intestinal development (immunohistochemical staining, ×100).
