Table 4.

MASS – Mayo Cohort.

Predictor	Score	Total Score	Stage	PFS (months)	OS (years)
High-risk IGH translocation	+1	0	MASS I	63.1	11.0
1q gain/amplification	+1
Chromosome 17 abnormality	+1	1	MASS II	44.0	7.0
ISS stage III	+1
Elevated LDH	+1	2+	MASS III	28.6	4.5

The MASS and associated median progression-free and overall survival estimates for the MAYO population (n = 1327).

IGH immunoglobulin heavy chain locus, ISS International Staging System, LDH Lactate Dehydrogenase, MASS Mayo Additive Staging System, OS overall survival, PFS progression-free survival.