Transient synovitis is also a leading cause of sudden hip pain occurring in children between 2 to 9 years old. However, synovitis mainly occurs in boys, and only one side of the hip is usually affected.
Some other causes of synovitis hip are:
- Inflammatory arthritis
- Loss of cartilage in the joint
- Trauma to the hip
- Viral infection (such as an upper respiratory infection, middle ear infection, bronchitis)
What Are the Symptoms of Synovitis of the Hip?
The most common symptom of synovitis hip is joint pain in the hip and groin region.
However, the pain might be more intense than is expected based on the appearance of the joint because there is often no visible evidence of injury or swelling that is causing pain in the hips.
Synovitis hip is also common in young patients ages 2 to 9. The symptoms that can be seen in pediatric patients are complaints of pain in the hips, a low-grade fever, limping, or finding it difficult to walk.
How Is Synovitis of the Hip Diagnosed?
The main concern when diagnosing transient synovitis of the hip is differentiating it from septic arthritis. Septic arthritis is an infection of the joints that destroys joint cartilage and can cause permanent damage to the joints.
In order to obtain a differential diagnosis, your healthcare provider does a physical examination to assess the joint’s range of motion.
A joint with septic arthritis will have pain with any attempted range of motion. This is one of the factors distinguishing septic arthritis from synovitis.
Your healthcare provider (or rheumatologist) might also order additional diagnostic tests such as the ones mentioned below.
Tests Used to Diagnose Synovitis of the Hip
Some different diagnostic tests that may be used by your healthcare provider to diagnose synovitis hip include:
- Plain radiographs – Used to evaluate the source of the pain.
- Ultrasound – Used to demonstrate a joint effusion (extra fluid flooding the tissues around your joint.)
- MRI – Used to detect abnormalities such as periarticular pyomyositis or osteomyelitis.
- Culture test – A test of the synovial fluid within the joint.
Synovitis Hip Treatment
Treatments for synovitis hip include:
- Rest/avoid bearing any weight on the joint
- Application of heat on the joint
- Massaging the painful area
- Anti-inflammatory medications to reduce the pain
- Steroid injections (often used with intense pain)