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Rai Staging System for Chronic Lymphocytic Leukemia (CLL)
Rai Staging System for Chronic Lymphocytic Leukemia (CLL)
Lymphadenopathy present
Any palpable lymph node group >=1 cm.
Hepatomegaly and/or splenomegaly
Anemia (hemoglobin <11 g/dL)
Thrombocytopenia (platelets <100 x10⁹/L)
ResultRai stage 0
Modified risk group: low risk.
- Stage
- 0
- Risk group
- Low
When to use
- Clinical staging of CLL at diagnosis (assumes lymphocytosis with or without bone marrow lymphocytic infiltration is already established).
Formula
Stage 0: lymphocytosis only. Stage I: + lymphadenopathy. Stage II: + hepato/splenomegaly. Stage III: + anemia. Stage IV: + thrombocytopenia. Highest applicable feature determines stage; modified risk groups: low (0), intermediate (I-II), high (III-IV).