PRIMA-PI (Follicular Lymphoma Prognostic Index)
PRIMA Prognostic Index (Bachy 2018): beta-2-microglobulin and bone-marrow involvement stratify follicular lymphoma into low, intermediate, and high risk (B2M > 3 mg/L is high).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Beta-2-microglobulin
- 2 mg/L
- Bone-marrow involvement
- Yes
Result: PRIMA-PI: intermediate risk (B2M <= 3 with marrow involvement).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Low
- B2M <= 3 mg/L without marrow involvement.
- Intermediate
- B2M <= 3 mg/L with marrow involvement.
- High
- B2M > 3 mg/L. A prognostic index, not a treatment order.
What you enter
- Beta-2-microglobulin
- Bone-marrow involvement
How this is calculated
Bachy E, Maurer MJ, Habermann TM, et al. A simplified scoring system in de novo follicular lymphoma treated initially with immunochemotherapy. Blood. 2018;132(1):49-58. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.