thymus

Cancer of the thymus gland is rare. Most cancers that start in the thymus gland are called thymomas. There’s also a much rarer form of thymus gland cancer called thymic carcinoma. What is the thymus gland? The thymus gland is in your chest, in between your lungs. A gland is an organ in your body that makes and releases substances such as hormones. The thymus gland is part of our lymphatic system . It’s involved in the development of a type of white blood cell called a T lymphocyte. These white blood cells are part of your immune system .