Previously untreated
What is

Actor portrayal.

CLL and SLL are types of cancer that affect your blood.

CLL (chronic lymphocytic leukemia) is a usually slow-growing blood cancer that affects B cells, also called B lymphocytes. B cells are a type of white blood cell that help fight infection.

SLL (small lymphocytic lymphoma) is closely related to CLL. However, SLL cancer cells are mostly found in the lymph nodes rather than in the blood and bone marrow.

Healthy cells become cancerous

In people with CLL, normal B cells mutate into abnormal, unhealthy cells.

Cancer cells begin to grow

These abnormal cells multiply more quickly than your healthy cells and may live longer than they’re supposed to. This makes it more difficult for healthy cells to do their job.

Cancer cells build up in the body

Abnormal B cells start to build up in the lymph nodes, bone marrow, and blood, and may also involve other organs, such as the liver and spleen.


Signs and symptoms of CLL/SLL may not develop for years, but when they do occur, they can include:

Swollen lymph nodes
Weight loss
Night sweats
Bruising easily
Pain in the stomach or a sense of “fullness”
(feeling full after only a small meal)

Risk factors

There are a few known risk factors for CLL/SLL.
These include:


Family history

Exposure to certain chemicals


Find a healthcare provider with experience treating CLL.

Prepare to have a more open and informed conversation with your doctor.

Learn more about CLL/SLL

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