Primary hepatic benign schwannoma

Figure 6 Microscopic appearance of the lesion. A: Histological examination revealed a tumor without fibrous capsule with interlacing bands of uniform spindle cells whose elongated nuclei were arranged in a palisading pattern (hematoxylin-eosin, original magnification × 200); B: Border area between tumor and non-tumor; C-E: Immunohistochemical analysis revealed that tumor cells were diffusely and strongly positive for S-100 (C), but negative for c-kit (D), or CD34 (E); F: The Ki-67 labeling index was 2%.