Choriocarcinoma is not cancerous, it is a benign tumor located on the intestinal mucosa, but a precancerous lesion with a high rate of cancer. 1. Also known as papillary adenoma, it is commonly found in the colon and rectum and has a high potential for cancer. The epithelial cells of the tumor will be accompanied by different degrees of abnormal hyperplasia of light, medium and heavy. Whether it is cancerous or not is closely related to the size of the diameter of the tumor, the type of histology and the degree of heterogeneous hyperplasia. 2. Although it is not cancerous, it may have symptoms such as blood in stool, change of stool character and bowel habit. If the diameter of the mass is larger than 2 cm with blood in stool, it is recommended to choose endoscopic resection and send it for pathological examination. If the mass is benign, you can wait for postoperative recovery; if it is malignant, you need to undergo further radical surgery, even with chemotherapy, radiotherapy and other treatment means. If you have similar symptoms as above, you should consult a doctor in time to avoid delaying your condition.