case_images: PMC10821604_01
case_images: Gluteal biopsy shows diffuse infiltrate of neoplastic cells (A) that expressed CD138 (B). Bone marrow biopsy reveals sheets of atypical plasma cells comprising approximately 70-80 % of the cellularity (C) that expressed CD138 (Figure1-D).
case_images: gr1.jpg
case_images: PMC10821604_01_gr1.jpg
case_images: fig0001
case_images: Biopsy of one of the nodules demonstrated a diffuse infiltrate of neoplastic cells (Fig.1-A) that expressed CD138 (Fig.1-B), MUM1 and displayed aberrant expression of CD4, CD30, and BCL2. Bone marrow biopsy demonstrated sheets of atypical plasma cells comprising approximately 70-80 % of the cellularity (Fig.1-C). On immunohistochemistry, CD138 (Fig.1-D) and MUM1 highlighted the lambda-positive plasma cells.