Mining of the TCGA Fusion gene Data Portal (http://54.84.12.177/PanCanFusV2/) 66 and other published fusion datasets in breast cancer 43, 64, 65 identified two additional in‐frame fusion genes involving RAP3GAP1 in breast cancer (RAB3GAP1–ACMSD and RAB3GAP1–MAP4K3). Here, RAB3GAP1 is linked to breast cancer.