Pediatric Radiology

, Volume 36, Issue 11, pp 1154–1158 | Cite as

MR imaging of transient synovitis: differentiation from septic arthritis

  • Wan Jik Yang
  • Soo Ah ImEmail author
  • Gye-Yeon Lim
  • Ho Jong Chun
  • Na Young Jung
  • Mi Sook Sung
  • Byung Gil Choi
Original Article



Transient synovitis is the most common cause of acute hip pain in children. However, MR imaging findings in transient synovitis and the role of MR imaging in differentiating transient synovitis from septic arthritis have not been fully reported.


To describe the MR findings of transient synovitis and to determine whether the MR characteristics can differentiate this disease entity from septic arthritis.

Materials and methods

Clinical findings and MR images of 49 patients with transient synovitis (male/female 36/13, mean age 6.1 years) and 18 patients with septic arthritis (male/female 10/8, mean age 4.9 years) were retrospectively reviewed.


MR findings of transient synovitis were symptomatic joint effusion, synovial enhancement, contralateral joint effusion, synovial thickening, and signal intensity (SI) alterations and enhancement in surrounding soft tissue. Among these, SI alterations and enhancement in bone marrow and soft tissue, contralateral joint effusion, and synovial thickening were statistically significant MR findings in differentiating transient synovitis from septic arthritis.


The statistically significant MR findings in transient synovitis are contralateral (asymptomatic) joint effusions and the absence of SI abnormalities of the bone marrow. It is less common to have SI alterations and contrast enhancement of the soft tissues. The statistically significant MR findings in septic arthritis are SI alterations of the bone marrow, and SI alterations and contrast enhancement of the soft tissue. Ipsilateral effusion and synovial thickening and enhancement are present in both diseases.


Transient synovitis Septic arthritis Hip MR Child 



We thank Bonnie Hami, Department of Radiology, University Hospitals Health System, Cleveland, OH, for editorial assistance in preparing the manuscript.


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Wan Jik Yang
    • 1
  • Soo Ah Im
    • 1
    Email author
  • Gye-Yeon Lim
    • 1
  • Ho Jong Chun
    • 1
  • Na Young Jung
    • 1
  • Mi Sook Sung
    • 1
  • Byung Gil Choi
    • 1
  1. 1.Department of Radiology, Kangnam St. Mary’s HospitalThe Catholic University of KoreaSeoulSouth Korea

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