For example, Coccaro et al. recently developed a ddPCR assay for the BCR-FGFR1 fusion transcript for MRD monitoring in a rare case of ALL with t(8;22)/BCR-FGFR1 gene fusion, for which standardized methods are lacking demonstrating that the ddPCR assay was capable of predicting hematologic relapse with a higher sensitivity than the classical PCR method [164]. Here, FGFR1 is linked to acute lymphoblastic leukemia.