Duchenne and Becker muscular dystrophy are names for the same disorder caused by genetic mutations in the DMD gene. If you or your child are experiencing symptoms that could be caused by this disorder, you should talk to your doctor. These symptoms may include muscle weakness that starts in the hips and shoulders and gradually spreads to affect the ability to walk. It's especially important to talk to a doctor if you're experiencing symptoms and have a family history of this disorder. Since the symptoms of Duchenne or Becker muscular dystrophy are so similar to those of other disorders, it's important to have a doctor diagnose the disease so you can get the best treatment possible for your condition.