Lymphoid aggregates in lungs. (A) Histological sections of lungs from WT and tnfsf11 knockout mice untreated (KO) or subjected to implants of 4 DC total (KO 4DC), stained with hematoxylin/eosin, showing lymphoid aggregates (arrows). (Bar = 100 μm). (B, C) Quantification of (B) number and (C) area of lymphoid aggregates in lungs. Results are (A) representative or (B, C) the mean ± s.d of 3 mice per group. Statistics: unpaired Student's t test. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)