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  Indian J Med Microbiol
 

Figure 1: Lymph node histopathological findings. Castleman disease, plasma cell type. Diffuse plasma cell proliferation (H and E, ×200) in the interfollicular tissue (a); underlined by immunostaining for CD138 (×200; b). Inconspicuous hyaline-vascular changes in the follicles. Immunostaining for IgG4 (×100; c) shows positive cells in the interfollicular regions

Figure 1: Lymph node histopathological findings. Castleman disease, plasma cell type. Diffuse plasma cell proliferation (H and E, ×200) in the interfollicular tissue (a); underlined by immunostaining for CD138 (×200; b). Inconspicuous hyaline-vascular changes in the follicles. Immunostaining for IgG4 (×100; c) shows positive cells in the interfollicular regions