the occurrence of ptfcs among numerous well-formed , secondary lymphoid follicles , and their exclusive association with exaggerated follicle formation speaks against an intrinsic inability of dendritic reticulum cells to bind antigen-antibody complexes , but rather suggests that ptfcs represent early , transient stages in the transformation of primary into secondary lymphoid follicles .
C0242245
dendritic reticulum cells
C0282491
secondary lymphoid