In patients with AL-amyloidosis, CD38-expression is neither associated with the number of affected organs, involvement of the heart as the most critical organ, nor the surrogate marker NT-proBNP (<332 vs. ≥332 ng/l) or the Mayo2004-score (Table 3; Figures S4–S6 in Supplementary Material). Here, NPPB is linked to AL amyloidosis.