ON THIS PAGE: You will learn about how doctors describe myelodysplastic syndromes (MDS). This is called MDS subtype and classification. Use the menu to see other pages.

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• How is MDS classified?

ON THIS PAGE: You will learn about how doctors describe ALL. This is called subtype and classification. Use the menu to see other pages.

Doctors divide ALL into subtypes and classify the disease based on the type of lymphocytes that are affected. For example, flow cytometry (see Diagnosis) distinguishes between ALL involving T cells or B cells. Specific chromosomal or genetic changes in the cancer cells are used to help plan treatment and predict prognosis.

Subtypes include:

• Precursor B-cell ALL