Figure 3

Structures of epithelioid granuloma with varies of coagulation necrosis in the lung under HE staining. A, Lung epithelioid granuloma with coagulation necrosis in the center, composed of a lot of lymphocytes and scattered multinucleated giant cells. Bronchial ciliated columnar epithelium structure was shown in the top left direction of figure, alveolar epithelium was shown in the lower left direction of figure (100×); B, Necrosis in the center of epithelioid granuloma, surrounded by lymphocytes and several multinucleated giant cells(100×);C, Fusion of epithelioid granuloma, amounts of coagulation necrosis located in the junction(100×).