FIG. 1.

Follicular dendritic cells in LM tertiary lymphoid organs. (A) A lymphoid aggregate within a macrocystic LM in the neck is positive for podoplanin, a marker of follicular dendritic cells (FDCs) and lymphatic endothelial cells. (B) Cells in the same aggregate are positive for the FDC-specific marker CNA.42, which is not present on lymphatic vessels. (C) and (D) FDCs detected by CNA.42 staining in lymphoid aggregates from microcystic LM of the neck from two different patients. Scale bar = 100 microns. This figure is available in color in the online version of this article at www.liebertpub.com/lrb