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haematology

R2-ISS — Second Revision International Staging System for Multiple Myeloma

Updated staging for newly-diagnosed multiple myeloma (D'Agostino, IMS 2022). Adds 1q+ to ISS, LDH and high-risk cytogenetics. Stratifies four risk groups (Low / Low-intermediate / Intermediate-high / High).

Score interpretation

Stage I — Low risk (5-y OS ~94%) 0

→ Standard induction (VRd or DaraVRd); ASCT if eligible; lenalidomide maintenance.

Stage II — Low-intermediate risk 1

→ DaraVRd induction; ASCT if eligible; lenalidomide maintenance; consider trial enrolment.

Stage III — Intermediate-high risk 1.1–2

→ Quadruplet induction (DaraVRd / Isa-KRd); tandem ASCT consideration; bortezomib + lenalidomide maintenance; trial enrolment encouraged.

Stage IV — High risk (5-y OS ~40%) 2.1–6

→ Quadruplet induction; tandem ASCT; intensified maintenance (PI + IMiD); consider early CAR-T or bispecific antibody trials; tight monitoring for relapse.

Interpretation bands for the R2-ISS. Apply clinical judgement and local guidance.

References

Related

Curated clinical cross-links plus same-class fallbacks.

Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.