Chronic lymphocytic leukemia (CLL): a type of cancer in
which the bone marrow makes too many lymphocytes (a type of white blood cell)
Chronic lymphocytic leukemia (CLL) is a slowly
progressing disease in which the bone marrow makes too many lymphocytes (a type
of white blood cell). CLL is one of the most common types of leukemia in
adults. It often occurs during or after middle age, and rarely occurs in
children. Signs and symptoms of CLL include swollen lymph nodes and tiredness.
Learn about chronic lymphocytic leukemia, and find
information on how we support and care for people with CLL before, during, and
The following information is from the National Cancer
Appointments and Second Opinions
As a new Dana-Farber patient, find answers to questions about your first visit: what to bring, how to find us, where to park, and how to prepare.
We offer a wide range of services, from financial planning to creative arts to spiritual counsel, to support our patients through their cancer experiences.