The bromodomain protein BRD4 has been reported to interact with FUS‐DDIT3 [18] and EWSR1‐FLI1/ERG [19], the specific FET‐FOPs in MLS and EWS, respectively, and plays a role in the aberrant gene expression induced by these oncoproteins. This evidence concerns the gene EWSR1 and McLeod neuroacanthocytosis syndrome.