Duchenne muscular dystrophy (DMD) is an inherited X-linked neuromuscular disorder, with an estimated prevalence of 1 in 5000 births.1 DMD is the result of an out-of-frame mutation in the Xq21 chromosome locus of the DMD gene, which causes a deficiency of the 427 kDa rod-shaped protein, dystrophin. This evidence concerns the gene DMD and Duchenne muscular dystrophy.