MR imaging of transient synovitis: differentiation from septic arthritis.

Abstract:

BACKGROUND: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. OBJECTIVE: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. RESULTS: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. CONCLUSIONS: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.

journal_name

Pediatr Radiol

journal_title

Pediatric radiology

authors

Yang WJ,Im SA,Lim GY,Chun HJ,Jung NY,Sung MS,Choi BG

doi

10.1007/s00247-006-0289-9

subject

Has Abstract

pub_date

2006-11-01 00:00:00

pages

1154-8

issue

11

eissn

0301-0449

issn

1432-1998

journal_volume

36

pub_type

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