![]() These are sometimes called tumour markers. These may show that there are metastases in the body that are too small to show up on a scan. They are too small to show up on any type of scan.įor a few types of cancer, blood tests can detect certain proteins that the cancer cells release. Micrometastases are areas of cancer spread (metastases) that are too small to see. This 2 minute video is about the lymphatic system. But some may survive and grow to form tumours in one or more lymph nodes. In the lymph glands, the cancer cells might die. They then can travel into nearby lymph glands. It also traps damaged or harmful cells such as cancer cells.Ĭancer cells can go into the small lymph vessels close to the primary tumour. It filters body fluid and fights infection. The lymphatic system is a network of tubes and glands in the body. Platelets are blood cells that help the blood to clot. This could also help the cancer cells to move into the surrounding tissues. The white blood cells in our immune system find and kill some cancer cells. Others cancer cells might die because they get battered around by the fast flowing blood.Ĭancer cells in the circulation may try to stick to platelets to form clumps. Only a few survive to form a secondary cancer. Many thousands of cancer cells that reach the bloodstream. ![]() This is quite a complicated process and most cancer cells don't survive it. ![]()
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