Fig. 2.

The protein abundance of CXCL8 was positively correlated with the progression of ADC patients. a CXCL8 in the serum of ADC patients was associated with the TNM stage. b CXCL8 in the serum of ADC patients was associated with the tumor grade. c Representative images (200×) of non-specific IgG control and CXCL8 immunohistochemical staining of A549 tumor tissue. d Representative images (200×) and quantitative graph of CXCL8 immunohistochemical staining in ADC and corresponding adjacent tissues. e Representative images (200×) and quantitative graph of CXCL8 immunohistochemical staining in different tumor sizes. f Representative images (200×) and quantitative graph of CXCL8 immunohistochemical staining in different tumor stages. g Representative images (200×) and quantitative graph of CXCL8 immunohistochemical staining in ADC with and without lymph node metastasis