What is the difference between cancer metastasis and spread?

metastasis and spread of cancer are the same concept. In clinical terms, it is called metastasis or spread. It is no different. The spread of cancer is metastasis. metastasis of cancer is the most characteristic clinical manifestation of malignant tumor. metastasis of cancer refers to tumor cells cutting into lymphatic vessels or blood vessels at the primary site, spreading to other places through dissemination, metastasis and other routes to continue to grow. metastasis is the same pathological type as the primary tumor. once a malignant tumor shows metastasis, it indicates that it has reached an advanced stage. Any malignant tumor once it shows metastasis to distant organs is already a stage IV malignant tumor, which is an advanced tumor.