Polymositis is characterized by inflammation and degeneration of the muscles. Dermatomyositis is polymositis accompanied by skin inflammation. In which of the following age groups do these disorders typically occur?
Adults ages 40 to 60 years, and children ages 5 to 15 yearsÂ
Children of all ages, and young adults ages 20 to 29 yearsÂ
Infants and young children ages 2 to 10 years
Young children ages 2 to 10 years, and adolescents ages 12 to 19 years
