患儿:男,13岁。因右下肢短缩及跛行8个月就诊,8个月前家长发现其双下肢不等长,跛行步态,臀部不对称。无下肢酸痛、麻木等不适,行走,跑跳等活动与同龄儿无明显不同。患儿自幼身体较健康,除偶尔感冒、发热等外无其他病史,无明确的外伤史,无接触放射性物质或误服其他药物史。4年前家长能肯定 Children: male, 13 years old. Due to the right lower limb shortened and claudication 8 months treatment, 8 months ago, parents found that their lower extremities unequal length, lame gait, hip asymmetry. No lower extremity soreness, numbness and other discomfort, walking, running jump and other activities with their children no significant difference. Children with a healthy body since childhood, except for occasional cold, fever and other non-other medical history, no clear history of trauma, no contact with radioactive material or other medication history. 4 years ago, parents can be sure