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Figure 2: Sacrococcygeal yolk sac tumor: Cytologically papillary clusters (a: MGG stain, ×40), and “glomeruloid” structures (a, inset: MGG stain, ×100) of undifferentiated tumor cells exhibiting prominent nucleoli and abundant vacuolated cytoplasm (b: MGG stain, ×1000). Histologically, reticular-microcystic architecture (c: H and E stain, ×40), Schiller-Duval bodies and hyaline (arrowheads) globules (d: H and E stain, ×100) |
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