NCCN Guidelines for Patients
Acute Lymphoblastic Leukemia, Version 1.2017
Acute lymphoblastic leukemia
You’ve learned that you have or may have
ALL. Part 1 explains some basics about
this cancer that may help you talk with
your doctor. These basics may also help
you start planning for treatment.
Blood is made of many types of cells. The three main
types are platelets, red blood cells, and white blood
cells. Each type of blood cell has a different job.
Platelets help control bleeding. Red blood cells carry
oxygen throughout the body. White blood cells help
fight germs and infections in the body. They are part
of your body’s disease-fighting system—called the
Lymphoblasts are a type of very young white blood
cells. Over time, they become mature white blood
cells called lymphocytes. Lymphocytes are mostly
found in the blood and lymphatic system.
The two main types of lymphocytes are
B-lymphocytes (B-cells) and T-lymphocytes (T-cells).
B-cells make antibodies that mark germs for killing.
T-cells alert your body that germs are present, kill
diseased cells, and help B-cells work.
Blood cells in bone
Bone marrow is the soft,
sponge-like tissue in the
center of most bones.
Blood stem cells in the
bone marrow make all
types of blood cells.
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