Fig. 1

Immunohistochemistry staining of FOXP1 in ICC and adjacent normal tissues and the Kaplan–Meier analysis. A, B Positive expression of FOXP1 in the adjacent noncancerous tissues (intrahepatic bile duct epithelium and hepatocytes, respectively). C Positive expression of FOXP1 in well-differentiated ICC. D Negative expression of FOXP1 in poorly differentiated ICC. Pictures were taken at a magnification of 200 × , scale bar = 50 μm. E–H Kaplan–Meier plots of the overall survival of patients grouped by FOXP1 expression, TNM stages, lymph node metastasis, and organ invasion