A sex-linked (X-linked) disorder in which affected males develop an increase in muscle size followed by weakness and wasting. It usually starts between the ages of 5 and 15, and 25 years after onset most patients are wheelchair-bound. Although most men become severely disabled, life expectancy is close to normal. The disorder is similar to Duchenne muscular dystrophy but less severe. P. E. Becker (20th century), German geneticist
Subjects: Medicine and Health — Science and Mathematics.