Leukemia is a type of blood cancer or bone marrow. It refers to white blood cell and start in the tissue that forms blood. Bone marrow is that centers of bone where blood cell is made. There are various types of blood cell including red blood cell, white blood cell in the body but this cancer is mostly affected in large numbers of abnormal white blood cells. It is a group disease called hematological neoplasm’s. There are four types of leukemia cancer: 1) Chronic lymphocytic leukemia: It affect over the age of 55. 2) Acute lymphoblastic leukemia: It is most common in young children. 3) Acute myelogenous leukemia: This type of cancer grows quickly and affects both younger and adult. 4) Chronic myelogenous leukemia: It is mainly for adults, start with myeloid and grow slowly to fast. Causes of Leukemia Cancer: The causes of leukemia cancer are age, genetic, environmental, lifestyle variables, with high level of radiations or chemotherapy, family history. All these forms are spread the ca