Leukemia is a cancer of the blood cells – the white blood cells (WBCs). Generally, white blood cells are produced in bone marrow, lymph nodes, spleen and thymus gland. After the formation, the WBCs circulate throughout the body. The causes behind leukemia include generic disorders such as Down syndrome, blood disorders, chemotherapy or exposure to high levels of radiation. Patients suffering from leukemia face symptoms like excessive sweating, fatigue, unintentional weight loss, swollen lymph nodes and frequent infections. Unlike BCC’s, leukemia can spread to the other body parts including the lungs, gastrointestinal tract, heart, kidney and testes.