Fig. 3
From: Primary hyaline vascular Castleman disease of the kidney: case report and literature review
Immunohistochemical findings. a The mantle zones consisting of B-cells were positive for CD20. b CD21 was present in the concentric follicular dendritic cell networks. c The CD3-positive labeled T cells were scattered near the germinal centers. d Ki-67 was positively expressed in only the follicle centers. e Staining for Bcl-2 was negative in the germinal centers. f Cyclin D1 was also negative in HV-CD