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Septic arthritis
M Mitchell1, B Howard, J Haller
1Department of Radiology, Veterans Administration Medical Center, San Diego, California.
Abstract:
Infectious arthritis is a commonly encountered clinical problem which may result from articular contamination by a wide variety of organisms. Involvement of an articulation may occur by one of four mechanisms: hematogenous spread, spread from a contiguous source of infection, direct implantation, or postoperative contamination. Distribution is typically monoarticular with a swollen, erythematous, and painful joint. The radiographic differential diagnosis includes limited rheumatoid arthritis, gout, synovial osteochondromatosis, and pigmented villonodular synovitis. In order to prevent complications, including growth disturbances, articular destruction with ankylosis, osteomyelitis, or soft tissue extension, early diagnostic arthrocentesis is important. Radiographic abnormalities, which include soft tissue swelling, joint space loss, periarticular osteopenia, and central or marginal osseous erosions, may be delayed following clinical onset of infection. Advanced imaging techniques such as scintigraphy, CT, or MRI may allow accurate diagnosis of the infectious process at an earlier stage.
Insights
Infectious arthritis, often affecting a single joint, requires early diagnosis via arthrocentesis to prevent severe joint damage. Advanced imaging aids in timely detection of this common clinical issue.
Area of Science:
- Orthopedics
- Infectious Diseases
- Radiology
Background:
- Infectious arthritis is a frequent clinical challenge caused by various pathogens.
- Joint involvement occurs through hematogenous spread, contiguous infection, direct implantation, or post-operative contamination.
- Typically presents as monoarticular arthritis with swelling, erythema, and pain.
Purpose of the Study:
- To review the mechanisms, clinical presentation, differential diagnosis, and complications of infectious arthritis.
- To emphasize the importance of early diagnostic arthrocentesis.
- To discuss the role of advanced imaging in early diagnosis.
Main Methods:
- Review of infectious arthritis mechanisms and clinical presentation.
- Discussion of radiographic differential diagnoses.
- Highlighting the utility of arthrocentesis and advanced imaging (scintigraphy, CT, MRI).
Main Results:
- Radiographic findings may be delayed, including soft tissue swelling, joint space loss, osteopenia, and osseous erosions.
- Early arthrocentesis is crucial for preventing complications like ankylosis and osteomyelitis.
- Advanced imaging techniques can facilitate earlier diagnosis.
Conclusions:
- Prompt diagnosis and intervention are essential for managing infectious arthritis.
- Arthrocentesis remains a key diagnostic tool.
- Advanced imaging modalities improve the detection of infectious arthritis, especially in early stages.