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[Monoarthritis]

P N Scutellari1, C Orzincolo, G Castaldi

  • 1Istituto di Radiologia-Università degli Studi di Ferrara.

La Radiologia Medica
|December 1, 1995
PubMed
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Monoarticular arthritis, often involving multiple joints, presents acutely with diverse causes like infection or inflammation. Prompt diagnosis and intervention are crucial to prevent joint destruction.

Area of Science:

  • Rheumatology
  • Orthopedics
  • Diagnostic Imaging

Background:

  • Monoarticular arthritis, defined as single-joint involvement, frequently presents as oligoarthritis (2-3 joints) and can be misdiagnosed due to its variable presentation and potential regression.
  • It can be an early sign of polyarthritis, such as rheumatoid arthritis, or arise from various causes including infections (septic arthritis), crystal deposition (gout), trauma, neoplasms, and immunologic or hormonal factors.
  • The acute onset, often with fever, pain, and swelling, necessitates prompt diagnosis to halt disease progression and prevent irreversible cartilage and bone damage, particularly in septic arthritis.

Purpose of the Study:

  • To review the diverse etiologies of monoarticular arthritis.
  • To highlight the importance of prompt diagnosis and management.
  • To discuss the role of various diagnostic modalities in differentiating causes and guiding treatment.

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Main Methods:

  • Review of clinical presentations and diagnostic approaches for monoarticular arthritis.
  • Analysis of radiographic findings, laboratory tests, synovial biopsy, and arthroscopy for differentiating infectious and inflammatory causes.
  • Evaluation of the utility and limitations of scintigraphy, CT, and MRI in diagnosing monoarticular conditions and deep-seated infections.

Main Results:

  • Radiographs are standard for initial assessment, revealing soft tissue swelling, effusion, and joint space changes; however, specific findings can differentiate disease types.
  • Laboratory tests, synovial biopsy, and arthroscopy are essential for distinguishing infectious from inflammatory arthritis.
  • Scintigraphy offers high sensitivity for joint uptake but low specificity, potentially missing lesions or confusing osteomyelitis with septic arthritis. CT and MRI are valuable for deep infections.

Conclusions:

  • Monoarticular arthritis encompasses a wide spectrum of conditions requiring prompt and accurate diagnosis.
  • A combination of clinical evaluation, imaging (radiography, CT, MRI), and laboratory/histological analyses is crucial for effective management.
  • Early differentiation between infectious and inflammatory causes is paramount to prevent joint destruction and guide appropriate therapy.