Lymphoma is a type of cancer which affects the lymph nodes or other components of the lymphatic system. It is characterised by the abnormal and uncontrolled division and replication of white blood cells, which are malignant and may invade an organ or spread throughout the body. Hodgkin’s disease is a specific type of lymphoma and all other types of lymphoma are referred to as non-Hodgkin’s lymphoma. The lymphatic system is present in all areas of the body, meaning that lymphoma can affect a variety of tissues and organs.