(http://www.cancer.org/cancer/leukemiachroniclymphocyticcll/detailedguide/leukemia-chronic-lymphocytic-what-is-cll)
Determing whether leukemia is acute or chronic most of the abnormal cells are immature. Acute leukemia is a fast-growing cancer that usually gets worse quickly. Chronic leukemia is a slower-growing cancer that gets worse slowly over time. …show more content…
Still, most people live for several years with the disease. Some people with CLL can live for years without treatment, but most eventually will need to be treated. Treatment for most people with CLL can go off and on for years. (http://www.cancer.org/cancer/leukemia-) For people that have refractory leukemia just means the CLL doesn’t go into remission or gets worse but it stays stable for a long period of time. After six or more months of treatment, the CLL may not respond to the treatment anymore causing a relapse.