Leukemia is the most common type of blood cancer, and it affects thousands of people each year. It is a serious illness where the body makes an abnormal number of white blood cells, which can interfere with normal blood cell production, resulting in such symptoms as fatigue, pale skin, bleeding, bone pain, and infections.

Leukemia is divided into four main types: acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML), chronic lymphocytic leukemia (CLL), and chronic myeloid leukemia (CML). The type, severity, and progression of the disease all depend on which type of leukemia is present.

Treatment for leukemia depends on the type and stage of the cancer, but may include chemotherapy, radiation therapy, targeted therapy, and bone marrow transplants. Chemotherapy, for example, is a common treatment for many forms of leukemia. It is done to reduce and destroy the cancer cells, and to slow down the progression of the disease. Radiation therapy may also be used, especially when there is involvement of large areas of the body.

The prognosis for leukemia depends on a few factors, including age, type of leukemia, and response to treatment. Older adults with certain types of leukemia typically have worse prognoses than younger patients and those with lower-risk forms of the disease. Early diagnosis and treatment, however, can improve a patient's chances of attaining remission and living a longer, healthier life.

Although there is no single known cause of leukemia, there are various risk factors which can increase an individual's likelihood of developing the disease. These include certain viruses, exposure to radiation, personal medical history, and certain genetic disorders.

Leukemia can be a frightening and overwhelming diagnosis, but it is important to remember that advances in diagnosis, treatments, and clinical trials offer hope for those living with this type of cancer. With the right combination of therapies and determination, many recovering from leukemia may be able to enjoy a full life.