CD40LG and lymphoplasmacytic lymphoma: They reported a sensitivity of the ddPCR assay of 5.00 × 10−5, far superior to the classical PCR method, after analyzing 291 samples (194 baseline samples and 97 FUs) from 148 patients (133 with WM, 11 with IgG lymphoplasmacytic lymphoma and four with IgM monoclonal gammopathy of undetermined significance).