“…Regarding the cancer milieu, the controversial roles of GM-CSF were demonstrated. Cancer-promoting functions are established in breast, glioma, liver, and pancreatic cancers ( Bayne et al, 2012 ; Kohanbash et al, 2013 ; Lin et al, 2017 ; Reggiani et al, 2017 ; Revoltella, Menicagli & Campani, 2012 ), whereas cancer-preventing roles are demonstrated in bladder, cervical, colon, esophageal, and prostate cancers ( Hori et al, 2019 ; Jiang et al, 2015 ; Nebiker et al, 2014 ; Wei et al, 2016 ; Zhang et al, 2017 ). In CCA, there is a report demonstrating that cirrhosis-related iCCA-derived GM-CSF promotes intense neutrophil infiltration ( Sasaki et al, 2003 ); however, the contradictory result is demonstrated in the spontaneous iCCA mouse model.…”