PERTHES DISEASE

PERTHES DISEASE - Perthes disease is a rare childhood condition that affects the hip. It occurs when the blood supply to the rounded head of the femur (thighbone) is temporarily disrupted. Without an adequate blood supply, the bone cells die, a process called avascular necrosis.

Although the term "disease" is still used, Perthes is really a complex process of stages that can last several years. As the condition progresses, the weakened bone of the head of the femur, gradually begins to break apart. Over time, the blood supply to the head of the femur returns and the bone begins to grow back.

Perthes disease also known as Legg-Calve-Perthes, named for the three individual doctors who first described the condition — typically occurs in children who are between 4 and 10 years old. It is five times more common in boys than in girls, however, it is more likely to cause extensive damage to the bone in girls. In 10% to 15% of all cases, both hips are affected.

Symptoms - 

One of the earliest signs of Perthes is a change in the way your child walks and runs. This is often most apparent during sports activities. Your child may limp, have limited motion, or develop a peculiar running style. Other common symptoms include:

• Pain in the hip or groin, or in other parts of the leg, such as the thigh or knee (called "referred pain.").
• Pain that worsens with activity and is relieved with rest.
• Painful muscle spasms that may be caused by irritation around the hip.

Depending upon your child's activity level, symptoms may come and go over a period of weeks or even months before a doctor visit is considered.