Toxic synovitis

Alternative Names

Synovitis – toxic; Transient synovitis

Definition of Toxic synovitis

Toxic synovitis is a condition affecting children that causes and limping.

Causes, incidence, and risk factors

Toxic synovitis occurs in children before puberty begins. It is a type of of the hip. Its cause is not known, but boys are affected more often than girls (approximately 4 to 1).


Symptoms may include:

Signs and tests

Toxic synovitis is diagnosed when other, more serious conditions have been ruled out, such as:


Treatment often includes limiting activity to make the child more comfortable. However, there is no danger with performing normal activities. The health care provider may prescribe nonsteroidal anti-inflammatory medications (NSAIDS) to reduce pain.

Expectations (prognosis)

The hip pain goes away within 7 – 10 days.


Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. – 11/2/2009

ADAM Medical Encyclopedia

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