The role of the thymus Over a lifetime, the human body faces a wide variety of threats from bacteria, viruses and other dangers, such as cancer. T cells, made by the thymus, fight pathogens and ...

This is called superior vena cava. This vein carries blood to the heart. Thymus gland cancer can press on it and cause superior vena cava syndrome. Symptoms can include: Your doctor might take a ...

As this happens, the T cell growth areas in the thymus are replaced with fatty tissue, diminishing T cell production and ...