Cancer cells spread retrogradely

Retrograde dissemination of cancer cells is one of the main symptoms of colorectal cancer tumor invasion and metastasis. Colorectal cancer is a general term for colon cancer and rectal cancer. Colorectal cancer refers to the intestinal mucosal epithelium that occurs under the influence of environmental or genetic factors such as carcinogens. Malignant lesions have a poor prognosis and a high mortality rate. Colorectal cancer is a malignant tumor of mucosal epithelium origin. Is one of the most common digestive tract tumors

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