Test Details: DMD is a rapidly progressive form of muscular dystrophy that occurs exclusively in males. It is caused by an alteration (mutation) in a gene, called the dystrophin gene that can be inherited in families in an X-linked recessive pattern. DMD has early onset affecting children between age 2 and 6 years. Multiplex DNA PCR is ndicated for rapid preliminary screening of individuals with clinical features suggestive of muscular dystrophy.