Muscular dystrophy (MD) is a group of genetic diseases in which muscle degeneration causes the rapid deterioration of the human system. Early signs include the enlargement of the calf and deltoid muscles, low endurance, and difficulties standing. As the condition worsens, muscle tissue experience wasting and patients may have trouble breathing and swallowing. Moreover, patients eventually become wheelchair-dependent between the ages of 8-12. While there is no cure for MD, some treatments can slow the course of the disease. Ultimately, however, the disease results in muscle degeneration and eventual death at an early age.