Precursor B-cell lymphoblastic leukemia

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Precursor B-cell lymphoblastic leukemia
Classification and external resources
ICD-10 C83.5
ICD-O M9836/3
MeSH D015452

Precursor B-cell lymphoblastic leukemia is a form of lymphoid leukemia in which too many B-cell lymphoblasts (immature white blood cells) are found in the blood and bone marrow. It is the most common type of acute lymphoblastic leukemia (ALL). It is sometimes additionally classified as a lymphoma, as designated leukemia/lymphoma.

It consists of the following subtypes:[1]

  • t(9;22)-BCR/ ABL
  • t(v;11q23)-MLL rearrangement
  • t(1;19)-E2A/PBX1
  • t(12;21)-ETV/ CBFα
  • t(17;19)-E2A-HLF

Molecular Mechanisms[edit]

One interesting model of precursor B ALL shows aberrant function of a single gene, namely Pax5, as capable to change phenotype of B cells toward precursor cells.[2][3]


  1. ^ Randolph TR (2004). "Advances in acute lymphoblastic leukemia". Clin Lab Sci 17 (4): 235–45. PMID 15559730. 
  2. ^ Carotta S, Nutt SL (March 2008). "Losing B cell identity". BioEssays 30 (3): 203–7. doi:10.1002/bies.20725. PMID 18293359. 
  3. ^ Den Boer ML, van Slegtenhorst M, De Menezes RX et al. (February 2009). "A subtype of childhood acute lymphoblastic leukaemia with poor treatment outcome: a genome-wide classification study". Lancet Oncol. 10 (2): 125–34. doi:10.1016/S1470-2045(08)70339-5. PMC 2707020. PMID 19138562. 

 This article incorporates public domain material from the U.S. National Cancer Institute document "Dictionary of Cancer Terms".

External links[edit]