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Acute Lymphoblastic Leukemia






Acute lymphoblastic leukemia (ALL) is the most common childhood malignancy:

  • Comprises one quarter of all childhood malignancies
  • 75% of all childhood leukemias
  • In North America the incidence is 3 - 4 cases per 100,000

The peak incidence is between 2 and 4 years of age (peak age of incidence may be becoming younger with time).

ALL is commoner in white vs black children.

ALL is commoner in boys vs girls (boys have a slightly worse prognosis).

Geographic variation in incidence (rare in North Africa and Middle East). Tends to be common in industrialized countries.


Below is a picture of ALL leukemic blast cells (large purple cells) in the peripheral blood.  The red cells are erythrocytes (red blood cells).



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Aidan's first month of being diagnosed and treated for Acute Lymphoblastic Leukemia




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