Fig. 2From: Thymic plasmacytoma presenting as polyneuropathy and revealing multiple myeloma: a case reportMicroscopic examination of the thymus biopsy showed diffuse infiltrates of plasma cells with large and eccentric nuclei and abundant cytoplasm (H&E × 400) (A). Immunohistochemistry showed tumor cells with diffuse reactivity to CD138 (× 200) (B) and nuclear positivity to MUM1 (× 200) (C)Back to article page