what is duchenne's muscular dystrophy
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. Itâs 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.