CXCL1 and colon adenocarcinoma: Although we first found the diagnostic and prognostic value of CXCL1 in COAD (rather than colorectal cancer), there were still some shortcomings in this study: a) There was imperfectness in the clinical information of COAD patients from TCGA database, and some important information such as tumor size, histological classification, degree of differentiation had not been provided.