A bulge of about 3 mm in diameter with superficial ulcer formation on the surface was seen in the transverse colon near the hepatic flexure, which may or may not be cancerous. A bulge of about 3mm in diameter is seen in the transverse colon near the hepatic flexure, with superficial ulcer formation on the surface, which should be the result report of colonoscopy, and this case may be colon cancer, or enteritis, ulcerative colitis, etc. The benignness and malignancy of the bulge can not be accurately determined by colonoscopy alone, and it is recommended to take the tissue of the bulge and perform a pathological biopsy, so that the benignness and malignancy can be determined according to the result of the biopsy. Although there are obvious differences between malignant and benign tumors in terms of shape, size, color and texture, the gold standard for determining the benignness or malignancy of a tumor is the pathological biopsy of the tissue, and the rest can only be the basis for suspicion. It is recommended to consult a doctor in time to avoid delay.