In BIN1, there is a preferential intron 14 retention in DM1, but a double exon skipping in FSHD, while in MBNL1, there is a triple exon skipping (exons 4, 5 and 6) in DM1, but a double exon skipping (exons 5 and 6) in FSHD. This evidence concerns the gene BIN1 and myotonic dystrophy type 1.