Rai Staging (CLL)
Rai stage (0–IV) for chronic lymphocytic leukemia — required blood/marrow lymphocytosis plus lymphadenopathy, organomegaly, anemia, and thrombocytopenia.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Blood + marrow lymphocytosis
- Yes
- Lymphadenopathy
- Yes
- Hemoglobin
- 14 g/dL
- Platelet count
- 250 ×10⁹/L
Result: Rai stage I (intermediate risk) — lymphadenopathy.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Stages
- 0 lymphocytosis only; I + lymphadenopathy; II + organomegaly; III + anemia (Hb < 11); IV + thrombocytopenia (< 100).
- Risk
- Modified grouping: low (0), intermediate (I–II), high (III–IV).
What you enter
- Blood + marrow lymphocytosis (required)
- Lymphadenopathy
- Splenomegaly / hepatomegaly
- Hemoglobin
- Platelet count
How this is calculated
Rai KR, Sawitsky A, Cronkite EP, Chanana AD, Levy RN, Pasternack BS. Clinical staging of chronic lymphocytic leukemia. Blood. 1975;46(2):219-234. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.