Fig. 2
Histopathological observation of mesenteric lymph nodes. a A representative of lymph node thin section stained with H&E showing the decrease of original lymphocytes and the increase of reticular cells and epithelioid cells. b The amplification of panel a, showing the characteristic diffuse granulomas in which epithelioid cells, macrophages, multinucleated giant cells (arrows) and lymphocytes aggregated. c The normal histology structure of mesenteric lymph nodes. d The amplification of panel d