KIDINS220 and rhabdomyosarcoma: Re‐analysis of a previously publicly available dataset 33 revealed copy number gains of the region of Chromosome 3 that incorporates the WWTR1 locus (chromosome 3q24‐q24) in 12% (five of 43) of human fusion gene‐negative rhabdomyosarcomas, but not in fusion gene‐positive ARMS (Figure 1E).