"The younger the age at the time of presentation, the more benign disease course is expected, and also for the same age, the prognosis is better in boys than girls due to less maturity 5,8. Conservative treatment is favourable in children with a skeletal age of 6 years or less at time of disease onset 14. Good outcomes are seen up to about 60% of cases16."
"Prognosis is also influenced by the percentage of femoral head involvement and degree of primary deformity of the femoral head and the secondary osteoarthritic changes that ensue. Children older than 8 years16 or with over 50% of femoral head necrosis at time of diagnosis should be considered for operative management 14. The aim of therapy is to try and maintain good femoroacetabular contact and a round femoral head."
"Karel Maydl (1853-1903): Austrian surgeon 13"
"Arthur Thornton Legg (1874-1939): American orthopaedic surgeon 11"
"Jacques Calvé (1875-1954): French orthopaedic surgeon 12"
"Georg Clemens Perthes (1869-1927): German surgeon 7"
Expected headings
"Early signs"
"Late signs"
"Fluoroscopy"
"The radiographic findings are those of osteonecrosis. There are separate systems for staging of Perthes disease:"
"Treatment in Perthes disease is largely related to symptom control, particularly in the early phase of the disease. As the disease progresses, fragmentation and destruction of the femoral head occur. In this situation, operative management is sometimes required to either ensure appropriate coverage of the femoral head by the acetabulum or to replace the femoral head in adult life."
"History and etymology"