In between samples with an SLC25A40–ABCB1 fusion on the barchart were other tumours with high ABCB1 expression without the SLC25A40–ABCB1 fusion, suggesting that additional structural changes may deregulate ABCB1. We, therefore, characterised 25 recurrent HGSC samples with high levels of ABCB1 using a modified 5′ Rapid Amplification of cDNA Ends (RACE) assay called FusionPlex4. The gene discussed is ABCB1; the disease is neoplasm.