Transient Synovitis of Hip

  • Etiology: inflammatory process leading to fluid in hip joint
  • Radiograph: widened hip joint space, not sensitive for hip effusion
  • US: hip effusion
  • DDX: septic hip, indistinguishable from transient synovitis on US

Cases of Transient Synovitis of Hip

US of transient synovitis of the hip
Sagittal US of the hips shows a large anechoic fluid collection in the anterior recess of the right femur, which is not present in the left hip. This right hip effusion, when tapped under ultrasound guidance, returned clear fluid.
Ultrasound of transient synovitis of the hip
Sagittal US of the hips shows a large anechoic fluid collection in the anterior recess of the left femur, which is not present in the right hip. This left hip effusion, when tapped under ultrasound guidance, returned clear fluid.