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Washington University Experience | NEOPLASM (SELLAR) | TTF-1-positive sellar tumor - Spindle cell oncocytoma (SCO) | 4D2 Spindle cell oncocytoma (Case 4) Plastic 1

One micron thick plastic sections show significant glassy, minimal granular tumor cell cytoplasm in comparison with its ultrastructural findings. (One-micron thick, plastic embedded, toluidine blue stained sections)

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