Teenager with legg calve perthes disease. What is outcome?

Legg-Calve-Perthes. Legg-calve-perthes disease can not be prevented. But with appropriate treatment, most children can go back to normal activities within 18 months to two years.
Poorer outcome. Outcome in legg perthes disease seems to be poorer in cases occurring in adolescence. Onset of Perthes before age 6 is better than after age 6. The onset of Perthes after age 9 is generally associated with a poor outcome. Structurely the less flattened and more rounded femoral head better prognosis.