At what age does Legg-Calvé-Perthes disease most commonly occur?

Legg-Calvé-Perthes disease is a condition that primarily affects children, characterized by avascular necrosis of the femoral head due to disrupted blood supply. The most common age range for this condition to occur is 4 to 10 years. During this period, children are typically more active, and the growth and development of the hip joint can be influenced by various factors, including vascularization.

In this age group, boys are affected more frequently than girls, and the disease can present with symptoms such as hip or groin pain, limping, and restricted motion. Early recognition and treatment are crucial to prevent long-term complications such as arthritis or deformities of the hip.

The other age ranges provided do not align with the typical onset of this condition. For example, younger children (1-2 years) are less likely to experience this type of avascular necrosis due to anatomical and vascular maturation factors. Children who are 11 years and older start to approach skeletal maturity, which significantly alters the dynamics of the hip joint and the likelihood of developing Legg-Calvé-Perthes disease. Therefore, the age range of 4 to 10 years is clearly recognized as the most common period for the onset of this condition.