Fig. 4.

Emodin prevents lung carcinoma lesions and carcinogenesis during urethane-induced lung carcinogenesis. a The whole lung in naked eye (n = 10). b HE staining of lung tissues (n = 10, ×10). c The area of involved lesions in HE staining (n = 10). d The number of nodes in lung surface (n = 10). The data present mean ± SD, the experiments were repeated 3 times, and statistical significance was determined by a t-test. *P < 0.05, **P < 0.01 vs control