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(a) Nuclear staining for brachyury in the neoplastic cells of chordoma (brachyury stain; original magnification, ×200). Absence of stain for brachyury in chondrosarcoma: (b) chordoma (brachyury stain; original magnification, ×100), (c) seminoma (brachyury stain; original magnification, ×200), and (d) chordoid meningioma (brachyury stain; original magnification, ×200).
