What is the traditional French-American-British (FAB) classification of acute myeloid leukemia (AML)?

Updated: May 26, 2020
  • Author: Karen Seiter, MD; Chief Editor: Emmanuel C Besa, MD  more...
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Answer

The traditional French–American–British (FAB) classification of AML is as follows:

  • M0 - Undifferentiated leukemia
  • M1 - Myeloblastic without differentiation
  • M2 - Myeloblastic with differentiation
  • M3 - Promyelocytic
  • M4 – Myelomonocytic; M4eo - Myelomonocytic with eosinophilia
  • M5 - Monoblastic leukemia; M5a - Monoblastic without differentiation; M5b - Monocytic with differentiation
  • M6 - Erythroleukemia
  • M7 - Megakaryoblastic leukemia

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