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What Is Duchenne Muscular Dystrophy? Muscular dystrophies are a group of diseases that make muscles weaker and less flexible over time. Duchenne muscular dystrophy (DMD) is the most common type. Itâs caused by flaws in the gene that controls how the body keeps muscles healthy. The disease almost always affects boys, and symptoms usually begin early in childhood. Children with DMD have a hard time standing up, walking, and climbing stairs.
A number sign (#) is used with this entry because Duchenne muscular dystrophy is caused by mutation in the gene encoding dystrophin (DMD; 300377). Description. Dystrophin-associated muscular dystrophies range from the severe Duchenne muscular dystrophy (DMD) to the milder Becker muscular dystrophy (BMD; 300376).1979) found DMD with X-1 translocation and suggested that the DMD locus is at Xp1106 or Xp2107. A number of females with X-autosome translocations with the breakpoint in the Xp21 band have shown Duchenne muscular dystrophy.