According to their website, LLS refers to the Leukemia & Lymphoma Society. It is known as the world's largest voluntary agency for the treatment of blood cancer.
The Leukemia & Lymphoma Society states that its main mission is to cure leukemia, lymphoma, Hodgkin's disease and myeloma. The organization also seeks to improve the quality of life of patients and their family members. They also fund blood cancer research.
The organization defines leukemia as a type of cancer that has an effect on blood and bone marrow. Leukemia is caused when blood cells in these areas grow uncontrollably. Lymphoma is a group of cancerous diseases that affect the lymphatic system. There are two main types of lymphoma: Hodgkin's and non-Hodgkin's.