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Childhood Acute Lymphoblastic Leukemia Treatment (PDQ®)

Patient Version
Last Modified: 04/17/2014

Risk Groups for Childhood Acute Lymphoblastic Leukemia



In childhood ALL, risk groups are used to plan treatment.

There are two risk groups in childhood ALL. They are described as:

  • Standard (low) risk: Includes children aged 1 to younger than 10 years who have a white blood cell count of less than 50,000/µL at diagnosis.
  • High risk: Includes children 10 years and older and/or children who have a white blood cell count of 50,000/µL or more at diagnosis.

Other factors that affect the risk group include the following:

It is important to know the risk group in order to plan treatment. Children with high-risk ALL usually receive more anticancer drugs and higher doses of anticancer drugs than children with standard-risk ALL.