Effects of radiation and silibinin on bronchoalveolar lavage fluid (BALF). (A) Representative pictures of Diff-quick staining of cytospin preparation in BALF after thoracic irradiation with and without silibinin treatment. Changes in macrophage size (A) and percentage of multinucleated macrophages in BALF at 80 and 200 days after thoracic irradiation. The data are reported as means ± SEM (n = 5 per group). *p < 0.05 vs. sham-irradiated controls. #p < 0.05 vs. irradiated groups.