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Diagnostic criteria for the classification of AA
| Peripheral blood cytopenias | Nonsevere (moderate) AA (not meeting criteria for severe disease) | SAA (any 2 of 3) | Very SAA (meeting criteria for severe disease and absolute neutrophils <200) |
|---|---|---|---|
| Bone marrow cellularity | <25% | <25% | <25% |
| Absolute neutrophil count | <500/μl | <200/μl | |
| Platelet count | <20,000/μl | ||
| Reticulocyte count | <1.0% corrected or <60,000/μl |
