Tumour infiltrating lymphocytes (TILs) are immune cells that gather around or inside a tumour. TILs can kill cancer cells and prevent the disease from spreading to other parts of the body.
Lymphocytes are specialized cells that are part of the body’s immune system. Lymphocytes respond to infections, injury, or cancer. Types of lymphocytes include B-cells and T-cells. Most TILs are T-cells.
There are two ways to describe TILss:
Tumours with non-brisk TILs are more likely to spread to a lymph node or a distant part of the body such as the lungs.