This document discusses Duchenne muscular dystrophy (DMD), a genetic disorder characterized by progressive muscle degeneration and weakness. It is caused by mutations in the dystrophin gene leading to absence of the dystrophin protein. The document outlines the clinical presentation and stages of DMD from early childhood to late stages requiring wheelchair use. It also discusses diagnostic testing, management including cardiac and nutritional support, genetic counseling and potential future treatments like exon skipping drugs.