In some people with CLL, the disease grows and progresses slowly.

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In fact, some patients may never need treatment for their CLL.

In other patients, the disease grows more quickly and needs treatment sooner.

There are 2 general types of CLL based on whether the disease affects B cells or T cells.

It is important for doctors to find out whether the disease is caused by the overgrowth of T cells or B cells.

You will also learn some general information on surviving the disease. This year, an estimated 20,110 people of all ages (12,310 men and 7,800 women) in the United States will be diagnosed with CLL. The average age of people diagnosed with CLL is 71. It is estimated that 4,660 deaths (2,880 men and 1,780 women) from CLL will occur this year.

Remember, survival rates depend on several factors. The survival rate for people with CLL varies widely according to the stage of the disease (see Stages.) The 5-year survival rate tells you what percent of people live at least 5 years after the cancer is found. The 5-year survival rate for people with CLL is 83%.If you would like more of an introduction, explore these related items.Please note that these links will take you to other sections on Cancer. It helps explain how many people are diagnosed with this disease and general survival rates.Or, use the menu to choose another section to continue reading this guide.ON THIS PAGE: You will find information about how many people are diagnosed with this type of leukemia each year.People should talk with their doctor if they have questions about this information. Statistics adapted from the American Cancer Society's (ACS) publication, Cancer Facts and Figures 2017, and the ACS website.