4Danon AD, Krishnan J, Frizzera G. Morpho - immuno phenotypic diversity of Castleman' s disease, hyaline - vascular type: with emphasis on a stroma rich variant and a new pathogenetie hypothe- sis[ J]. Virchows Arch A Pathol Anat Histnpathol, 1993; 423 (5) :369 - 382.