The lymphatic system is a network of tissues and organs that runs throughout the body. Primarily consists of lymph vessels, lymph nodes and lymph. The tonsils, adenoids, spleen and thymus are all part of the lymphatic system. The lymphatic system is like the blood circulation - the tubes (vessels) branch through all parts of the body like the arteries and veins that carry blood.
Lymphoedema is a fairly common problem. People with certain types of cancer such as women with breast cancer, are at risk of developing lymphoedema. It can occur as a result of radiotherapy, surgery to remove lymph nodes, or because the lymph nodes are blocked by cancer. Lymphoedema that is caused by a disease or the side effect of medical treatment is called secondary lymphoedema.