Figure 3From: Application of tri-colour, dual fusion fluorescence in situ hybridization (FISH) system for the characterization of BCR-ABL1 fusion in chronic myelogenous leukaemia (CML) and residual disease monitoring Residual disease monitoring in patient with reciprocal ABL1-BCR deletion. (A) Interphase BCR-ABL1 D-FISH shows random signal overlap that could be mistakenly scored as fusion signal. (B) Interphase BCR-ABL1 tri-colour dual fusion shows random signal overlap without genuine fusion.Back to article page