Criteria for severe aplastic anaemia
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Updated: Oct 12, 2026

Comprehensive Protocol to Sample and Process Bone Marrow for Measuring Measurable Residual Disease and Leukemic Stem Cells in Acute Myeloid Leukemia
Published on: March 5, 2018
C Rozman1, P Marín, B Nomdedeu
1Postgraduate School of Haematology Farreras Valenti, Hospital Clinic i Provincial, Barcelona, Spain.
To study the validity of currently accepted international criteria for severe aplastic anaemia, 213 consecutive cases of bone marrow aplasia from a single institution were analysed. The distribution percentiles of peripheral blood values and multivariate analysis showed that the current reticulocyte count limit of 1% (corrected for haematocrit) is inadequate an an indicator of severe disease and should be substantially lowered. Since the choice of treatment in aplastic anaemia may depend on the prognosis current criteria for severe aplastic anaemia should be modified.
To study the validity of currently accepted international criteria for severe aplastic anaemia, 213 consecutive cases of bone marrow aplasia from a single institution were analysed. The distribution percentiles of peripheral blood values and multivariate analysis showed that the current reticulocyte count limit of 1% (corrected for haematocrit) is inadequate an an indicator of severe disease and should be substantially lowered. Since the choice of treatment in aplastic anaemia may depend on the prognosis current criteria for severe aplastic anaemia should be modified.
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