DUX4 and a subset of its target genes are detected in foetal human FSHD muscle (Broucqsault et al, 2013; Ferreboeuf et al, 2014) and DUX4 is expressed in iPSCs FSHD models of early myogenic specification and myogenesis (Haynes et al, 2017). This evidence concerns the gene DUX4 and Facioscapulohumeral dystrophy.