What is one disease that affects the muscular system?

One disease that affects the muscular system is muscular dystrophy. Muscular dystrophy is a degenerative condition that causes wasting and weakening of the muscles. It is caused by defects in the genes that control the production of muscle proteins. The most common type of muscular dystrophy is Duchenne muscular dystrophy, which affects boys almost exclusively. It is inherited in an X-linked recessive manner, meaning that the defective gene is located on the X chromosome. Other types of muscular dystrophy include Becker muscular dystrophy, which is milder than Duchenne muscular dystrophy, and limb-girdle muscular dystrophy, which affects the muscles of the limbs and trunk. There is no cure for muscular dystrophy, but treatment can help to slow the progression of the disease and improve quality of life.