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Figure 2: (a) A dark reddish polypoid mass, 26 mm in diameter, is seen in the ureteropelvic junction (arrowhead, inset). (b) Diffuse infiltrate of large atypical lymphoid cells (H and E, stain, ×100). (c) The neoplastic cells have plasmablastic appearance (H and E, stain, ×600). The neoplastic cells are positive for (d) CD138 (immunoperoxidase stain, ×200), (e) c-myc (×400), and (f) Epstein–Barr virus-encoded RNA (in situ hybridization, ×400) |
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