NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,020 terms related to cancer and medicine.
- listen (ek-STRA-vuh-SAY-shun)
- The leakage of blood, lymph, or other fluid, such as an anticancer drug, from a blood vessel or tube into the tissue around it. It is also used to describe the movement of cells out of a blood vessel into tissue during inflammation or metastasis (the spread of cancer).