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Skeletal Radiology

, Volume 46, Issue 6, pp 759–767 | Cite as

Value of ultrasonography in the diagnosis of gout in patients presenting with acute arthritis

  • Nuttaya PattamapaspongEmail author
  • Withawat Vuthiwong
  • Thanat Kanthawang
  • Worawit Louthrenoo
Scientific Article

Abstract

Objective

To evaluate the value of ultrasonographic features of crystal deposition for diagnosing gout in patients presenting with acute arthritis.

Materials and methods

Ultrasound scanning of the most inflamed joint was performed on 89 consecutively enrolled patients with acute arthritis. Two radiologists independently reviewed the ultrasound images, and a consensus was achieved with a third radiologist when the interpretations of four key ultrasound features of gout differed. Arthrocentesis and crystal analysis using compensated polarized light microscopy of aspirates are considered the gold standards for gout diagnosis.

Results

Fifty-three (60%) patients had gout, whereas the remaining 36 (40%) had non-gout arthritis. The mean serum uric acid level was 7.1 mg/dl in patients with gout and 4.7 mg/dl in patients with non-gout arthritis. Three US features differed significantly (p < 0.001) between patients with gout and non-gout arthritis: the double contour sign (42 vs. 8%, respectively), intra-articular aggregates (58 vs. 8%), and tophi (40 vs. 0%). No statistically significant differences in detecting intra-tendinous aggregates (32 vs. 17%, p = 0.14) were observed. The sensitivity and specificity of the double contour sign were 42 and 92%, respectively; those of the intra-articular aggregates were 58 and 92%; and those of tophi were 40 and 100%. The positive predictive values for these three features ranged from 88 to 100%, whereas the negative predictive values ranged from 52 to 60%.

Conclusions

When the prevalence is high, these three ultrasound features may be a useful adjunct in the diagnosis of acute gout, particularly when specialized microscopic techniques are not available.

Keywords

Gout Uric acid Arthritis Ultrasonography 

Notes

Acknowledgments

We are grateful to Professor Bruce G. Weniger for offering editorial and technical advice and to Dr. Kanon Jatuworapruk for providing the patient clinical data.

Compliance with ethical standards

This investigational protocol was conducted in accordance with the guidelines of the Institutional Review Board.

Conflict of interest

The authors have no potential conflicts of interest to disclose.

Funding source

None.

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Copyright information

© ISS 2017

Authors and Affiliations

  • Nuttaya Pattamapaspong
    • 1
    Email author
  • Withawat Vuthiwong
    • 1
  • Thanat Kanthawang
    • 1
  • Worawit Louthrenoo
    • 2
  1. 1.Department of Radiology, Faculty of MedicineChiang Mai UniversityChiang MaiThailand
  2. 2.Division of Rheumatology, Department of Internal Medicine, Faculty of MedicineChiang Mai UniversityChiang MaiThailand

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