(A) Haematoxylin and eosin stained section of multicentric Castleman's disease in a human immunodeficiency virus (HIV) positive patient showing a high vascular score. (A) Haematoxylin and eosin stained section of multicentric Castleman's disease in a human immunodeficiency virus (HIV) positive patient showing a high vascular score. (B) A human herpesvirus 8 (HHV-8) infected lymphoid cell in a subcapsular space. (C) Vascular CD31 staining in the same node. J O'Leary et al. Mol Path 2000;53:69-76 ©2000 by BMJ Publishing Group Ltd and Association of Clinical Pathologists