title: French–American–British classification
text: # French–American–British classification
  
  The French–American–British (FAB) classification systems refers to a series of classifications of hematologic diseases. It is based on the presence of dysmyelopoiesis and the quantification of myeloblasts and erythroblasts.
  
  It was first produced in 1976.
  
  Types include:
  
  * FAB classification of acute lymphoblastic leukemias: L1–L3 (three subtypes)
  * FAB classification of acute myeloid leukemias: M0–M7 (eight subtypes)
  * FAB classification of myelodysplastic syndromes
  
  Updates continued through at least 1989.
  
  