👉 Leukemia is a type of cancer that occurs in white blood cells, which are part of the body's immune system. It is characterized by abnormal growth and division of these white blood cells, leading to the formation of tumors or cancers. In leukemia, abnormal changes can occur in various parts of the body, including the bones, spleen, liver, lymph nodes, and bone marrow. The exact cause of leukemia is not fully understood but it is believed that it may be caused by a combination