What is the primary characteristic of Legg-Calve-Perthes Disease?

Legg-Calve-Perthes Disease is primarily characterized by avascular necrosis of the proximal femoral head. This condition occurs when blood supply to the femoral head is temporarily disrupted, leading to degeneration of the bone tissue. As the disease progresses, the lack of blood flow results in the death of the bone cells in the femoral head, which can cause pain, limping, and reduced range of motion in the hip joint.

Children between the ages of 4 and 10 are most commonly affected, and the condition typically manifests as hip pain, which can sometimes be referred to the knee. The avascular necrosis leads to changes in the shape of the femoral head as it heals, making early diagnosis and management critical to preserving hip function and preventing long-term complications, such as arthritis.

Understanding this core characteristic is crucial for diagnosing and treating the condition effectively, as management may include rest, physical therapy, anti-inflammatory medications, and in some cases, surgical intervention to correct the hip joint alignment or to contain the femoral head properly during the healing process.