Figure 4From: Retroperitoneal paraganglioma with metastasis to the abdominal vertebra: a case reportCell cytoplasm showed positive reactivity for synaptophysin (A1, ×100; A2, × 400). Individual support cells showed positive reactivity for S-100 protein (B1, × 100; B2, × 400). Ki-67 labeling index was less than 1% (C1, × 100; C2, × 400).Back to article page