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Abstract Number: 1207

Clinical Evaluation Correlates Poorly with Ultrasound and Magnetic Resonance Imaging of Joints and Entheses in Early Peripheral Spondyloarthritis

Thomas Renson1, Ann-Sophie De Craemer1, Philippe Carron1, Simon Krabbe2, Lennart Jans3, Manouk de Hooge4, Peggy Jacques1, Mikkel Østergaard5, Dirk Elewaut1 and Filip van Den Bosch6, 1Department of Rheumatology, Ghent University Hospital, Ghent, 9000, Belgium, 2Copenhagen Center for Arthritis Research (COPECARE), Center for Rheumatology and Spine Diseases, Rigshospitalet, Centre for Head and Orthopaedics, Rigshospitalet, Glostrup, Denmark, 3Department of Radiology, Ghent University Hospital, Ghent, Belgium, 4Ghent University Hospital, Ghent, Belgium, 5Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Rigshospitalet, Glostrup, Denmark, Copenhagen, Denmark, 6Department of Rheumatology, Ghent University Hospital, Ghent, Belgium

Meeting: 2018 ACR/ARHP Annual Meeting

Keywords: Enthesitis, MRI, spondylarthritis and ultrasound

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Session Information

Date: Monday, October 22, 2018

Session Title: Imaging of Rheumatic Diseases Poster II: Ultrasound

Session Type: ACR Poster Session B

Session Time: 9:00AM-11:00AM

Background/Purpose: Enthesitis is a hallmark of spondyloarthritis (SpA), which occurs in 30 to 50% of psoriatic arthritis patients [1]. Evaluation of tenderness at the site of an enthesis with a standard palpation approach remains the gold standard for detection of enthesitis. However, inter- and intra-observer variability is rather high. All existing clinical enthesitis scoring systems lack validity. Imaging could avoid these drawbacks. The objective of this study is to compare the performance of ultrasound (US) and magnetic resonance imaging (MRI) with clinical examination (CE) of joints and entheses in peripheral (p)SpA.

Methods: Clinical REmission in peripheral SPondyloArthritis (CRESPA) is a placebo-controlled trial of golimumab treatment in 60 early (symptom duration < 12 weeks) pSpA patients. CE included tender and swollen joint count, dactylitis and enthesitis (evaluation of palpation tenderness) count. All patients underwent Power Doppler (PD)US of entheses and knee, talocrural (TC) and subtalar (ST) joints. Synovitis was scored according to the OMERACT-EULAR-US composite PDUS scale, giving a score of 0-3 for each joint. Entheseal sites were evaluated for hypoechogenicity and intraenthesis Doppler signal and were scored on a scale of 0 –3. Modified whole-body MRI was performed at baseline. Bone marrow edema (BME), synovitis and soft tissue inflammation (STI) were scored (scale 0-3) by 3 readers at several anatomical sites of pelvis and lower limbs. For each site a mean of the scores of the 3 readers was calculated.

Results:

Table 1: Prevalence of synovitis and enthesitis on CE, US and MRI

Joints/entheses

CE

US

MRI

Hip joint

3/60 (0)

–

4/60 (1)

Knee joint

21/60 (6)

25/60 (8)

24/60 (7)

Talocrural joint

14/60 (1)

9/60 (1)

24/60 (13)

Subtalar joint

7/60 (2)

10/60 (12)

15/60 (0)

Quadriceps tendon

10/60 (2)

9/60 (1)

4/60 (0)

Superior patellar ligament

8/60 (2)

8/60 (1)

7/60 (3)

Inferior patellar ligament

6/60 (1)

Achilles tendon

14/60 (2)

11/60 (2)

17/60 (4)

Plantar fascia

15/60 (4)

7/60 (1)

17/60 (9)

Prevalence of bilateral involvement is indicated between brackets.

Synovitis detected by US and MRI was most prevalent at knee joints (Table 1). A discrepancy was noted between TC synovitis detected by CE, US and MRI. Enthesitis was most prevalent at Achilles tendon and plantar fascia. Regarding enthesitis, agreement between CE and US ranged from no (kappa -0.082) to moderate agreement (kappa 0.562). The highest agreement was observed at the entheseal sites of Achilles tendon (left 0.511, right 0.350) and plantar fascia (left 0.321, right 0.507). MRI did not correlate better with CE than US (kappa from -0.077 to 0.446). The correlation between MRI and US was overall poor and only in the Achilles tendon moderate (range -0.106 to 0.656).

Conclusion: There was a weak agreement between CE and imaging in detecting enthesitis. In general, US detects less enthesitis compared to CE, while MRI detects more.

References:
1. Gladmann DD, Chadran V. Observational cohort studies: lessons learnt from the university of Toronto Psoriatic Arthritis Program. Rheumatology 2011;50(1):25-31.


Disclosure: T. Renson, None; A. S. De Craemer, None; P. Carron, None; S. Krabbe, None; L. Jans, None; M. de Hooge, None; P. Jacques, None; M. Østergaard, None; D. Elewaut, None; F. van Den Bosch, None.

To cite this abstract in AMA style:

Renson T, De Craemer AS, Carron P, Krabbe S, Jans L, de Hooge M, Jacques P, Østergaard M, Elewaut D, van Den Bosch F. Clinical Evaluation Correlates Poorly with Ultrasound and Magnetic Resonance Imaging of Joints and Entheses in Early Peripheral Spondyloarthritis [abstract]. Arthritis Rheumatol. 2018; 70 (suppl 10). https://acrabstracts.org/abstract/clinical-evaluation-correlates-poorly-with-ultrasound-and-magnetic-resonance-imaging-of-joints-and-entheses-in-early-peripheral-spondyloarthritis/. Accessed January 27, 2021.
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