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Eble JN, Sauter G., Epstein JI, Sesterhenn IA - iarc

Eble JN, Sauter G., Epstein JI, Sesterhenn IA - iarc

Eble JN, Sauter G., Epstein JI, Sesterhenn IA - iarc

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Plasmacytoma<br />

A. Orazi<br />

Plasmacytoma (PC) of the kidney most<br />

often occurs as a manifestation of disseminated<br />

multiple myeloma. The kidney,<br />

however, may rarely be the site of origin<br />

of a solitary (primary) extraosseous PC<br />

{1266,2933}. PC of the kidney is histologically<br />

indistinguishable from plasmacytoma<br />

occurring elsewhere. To qualify as<br />

a primary PC, a complete radiologic<br />

work-up must show no evidence of other<br />

lesions. The bone marrow must show no<br />

evidence of plasmacytosis and/or plasma<br />

cell monoclonality. The other myeloma<br />

associated criteria are also absent.<br />

A<br />

B<br />

Fig. 1.130 Plasmacytoma involving the kidney in a patient with disseminated multiple myeloma. A The low<br />

power photomicrograph shows a well demarked nodular lesion surrounded by unremarkable kidney<br />

parenchyma. B High magnification illustrating the plasma cell proliferation which is characterized by a mixture<br />

of both mature and immature plasma cells.<br />

C<br />

86 Tumours of the kidney

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