Solitary extramedullary plasmacytoma in retroperitoneum: A case report and review of the literature

Figure 1 Abdominal computed tomography showing a large heterogeneous mass in the right retroperitoneal region, surrounding the posterior portion of the right kidney and compressing the right kidney (A), and slightly enhanced tumor tissue after injection of a contrast medium (B).

Figure 2 Tumor cells with homogenous amphophilic cytoplasm, whell-type and asymmetric nuclei, coarsely stippled chromatin, some acidophilic nucleoli, and occasional binucleate (A) (HE, × 100) and positive tumor cells for CD138 (B) (× 400) under microscope.