Fig. 1From: Risk stratification for predicting postoperative recurrence/metastasis of colorectal cancer by grade of venous invasion coupled with histological subtypeRepresentative histopathology of venous invasion. A Infiltrating type of venous invasion. The cancer cell nest destroys and invades the circular elastic plate adjacent to the artery. B Filling type of venous invasion. Tumor embolus is found in the vein with a diameter greater than 1 mmBack to article page