User:Mr. Ibrahem/Transient synovitis

Transient synovitis of hip, also called toxic synovitis, is a self-limiting inflammation of the lining of the hip joint. Symptoms often include pain in the groin, a limp, or refusal to walk. Symptoms often come on over a few days and there is generally no fever. Pain generally only occurs with significant movements at the hip. The child generally looks otherwise well.

The exact cause is unknown. A recent viral infection (most commonly an upper respiratory tract infection) or recent injury has been proposed as triggers. Diagnosis involves ruling out other potential causes. Blood tests may show mild inflammation. An ultrasound scan may show a fluid collection in the hip joint which may require aspiration to rule out a infection.

Treatment is with NSAIDs and limited weight-bearing. The condition is usually better within two days and clears completely within 2 weeks. The recurrence rate is as high as 25%.

Transient synovitis affects up to 3% of children at some point in time. Most commonly it occurs between three and ten years of age and is the most common cause of hip pain in this age group. Rarely other age groups are affected. Boys are affected twice as often as girls.