Which statement best describes Legg-Calve-Perthes disease?

Legg-Calve-Perthes disease is best characterized by the details provided in the correct choice. This condition primarily affects the femoral head in children, typically presenting in males more frequently than females, with an average onset around 6 years of age. The disease leads to avascular necrosis of the femoral head, which can result in weakened hip structures, often leading to a psoatic gait due to weakness of the psoas major muscle. As the disease progresses, it can cause significant hip joint pain and mobility issues, particularly in range of motion involving hip flexion, abduction, and internal rotation.

The other statements do not accurately capture the essence of Legg-Calve-Perthes disease. For instance, stating that the typical onset is around 13 years and mentioning restricted range of motion without linking it to the anatomical and muscular impact does not align with typical presentations of the condition. Identifying etiology related to blood supply deficiency is relevant but does not encompass the specific details regarding the male predominance and age of onset as thoroughly. Moreover, the reference to shoulder motion is indicative of a different condition, unrelated to Legg-Calve-Perthes disease, further highlighting the importance of accurate definitions in orthopedic pediatric