case_images: PMC10776134_01
case_images: Bone marrow biopsy showing markedly decreased erythropoiesis (low power magnification, x10, H&E stain).
case_images: cro-2024-0017-0001-535636_F01.jpg
case_images: PMC10776134_01_cro-2024-0017-0001-535636_F01.jpg
case_images: F1
case_images: Bone marrow aspiration and biopsy, shown in Figure 1, demonstrated characteristic findings of marked erythroid hypoplasia.
case_images: Bone marrow biopsy with interstitial aggregates of well-differentiated lymphocytes, immunoreactive to CD5+, CD20+, PAX5+, and negative for cyclin D1, comprising approximately 2.5-5% of marrow cellularity (high power magnification, x40, H&E stain).
case_images: cro-2024-0017-0001-535636_F02.jpg
case_images: PMC10776134_01_cro-2024-0017-0001-535636_F02.jpg
case_images: F2
case_images: There was a small population, shown in Figure 2, representing 2.5-5% of total cells, of monoclonal kappa B cells (CD19+, CD20+, CD22+ co-expressing CD5, and CD23).