case_images: PMC11813634_01
case_images: Bone marrow aspiration showing multiple plasmacytoid cells with eccentric, enlarged nuclei (arrow) and multinucleation (*) (a, b: MGG stain, x400).. MGG: May-Grunwald Giemsa
case_images: cureus-0017-00000077310-i01.jpg
case_images: PMC11813634_01_cureus-0017-00000077310-i01.jpg
case_images: FIG1
case_images: Photomicrographs of the lymph node show diffuse infiltration by plasmablastic cells with enlarged, centrally located nuclei and prominent nucleoli (a: H&E, x200). The bone marrow biopsy reveals multiple immature large plasma cells with a plasmablastic appearance (b: H&E, x100). Immunohistochemical staining of the lymph node proliferation shows the diffuse positivity of plasmablastic cells for both CD79a (c: x100) and CD138 (d: x40), along with an elevated Ki-67 index (e: x200).. H&E: hematoxylin and eosin
case_images: cureus-0017-00000077310-i02.jpg
case_images: PMC11813634_01_cureus-0017-00000077310-i02.jpg
case_images: FIG2
case_images: The proliferative index, assessed by Ki-67, was unusually high at 80%, diverging from the typical profile of plasma cell myeloma (Figure 2).