Table 8. Amyloidosis Staging System (Mayo 2012 Model).

Stage	Troponin T (μg/L) or hs-cTnT (ng/L)	NT-proBNP (ng/L)	Difference between involved and uninvolved (mg/dL)	Prognosis in patients not undergoing AuSCT (mo)	Prognosis in patients undergoing AuSCT (mo)
I	< 0.025 μg/L	< 1,800	< 18	55	NR
II	Any one factor elevated			19	62.8
III	Any two factors elevated			12	16.8
IV	> 0.025 μg/L OR ≥ 40 ng/L	> 1,800	> 18	5	5.8

Note. hs-cTnT = high-sensitive cardiac troponin T; NT-proBNP = N-terminal of the prohormone brain natriuretic peptide; AuSCT = autologous stem cell transplant; OR = overall response. Adapted from Kumar et al. (2012a); Muchtar et al. (2018).