Staging of chronic lymphocytic leukemia
| Stage | Simplified 3-stage system | Clinical features | Median survival (years) |
|---|---|---|---|
| 0 | Low risk | Lymphocytosis in blood and marrow only | > 10 |
| I | Intermediate risk | Lymphadenopathy | 7 |
| II | Splenomegaly with or without hepatomegaly | ||
| III | High risk | Anemia | 1.5–4 |
| IV | Thrombocytopenia |
Based on information in reference 19.