DM1 is caused by an expanded (CTG)n in the 3’ untranslated region of Dystrophia Myotonica Protein Kinase (DMPK) gene, while DM2 is caused by an expanded (CCTG)n in the intron 1 of CCHC-type zinc finger, nucleic acid-binding protein (CNBP) gene [1–5]. This evidence concerns the gene DMPK and myotonic dystrophy type 1.