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pathological results. A: Microscopically, the tumoral lesion had a nest-like and Trabecular-like structure and granular cytoplasm, and the tumor cells were uniform in size and rich in blood sinuses (HE×100); B: Strong immunoreactivity for CgA in tumor cells. Original magnification: ×100; C: The Ki67 proliferation index is about 20% in tumor cells. Original magnification: ×100; D: Strong immunoreactivity for Syn in tumor cells. Original magnification: ×100.
