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Abstract Number: 1195

The Evaluation of the Small Enthesis of the Hands By Ultrasound: A Study on Healthy Subjects

Sibel Bakirci1, Dilek Solmaz2, Wilson Stephenson3, Lihi Eder4, Johannes Roth5 and Sibel Zehra Aydın6, 179 Cresthaven Drive, University of Ottawa, Ottawa, ON, Canada, 2Rheumatology, University of Ottawa, Ottawa, ON, Canada, 3Internal Medicine, University of Ottawa, Ottawa, ON, Canada, 4Women's College Research Institute, University of Toronto, Women's College Hospital, Toronto, ON, Canada, 5Pediatric Rheumatology, Children's Hospital Eastern Ontario, Ottawa, ON, Canada, 6University of Ottawa, Ottawa, ON, Canada

Meeting: 2018 ACR/ARHP Annual Meeting

Keywords: Enthesopathy, hand disorders and ultrasound

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Session Information

Date: Monday, October 22, 2018

Title: Imaging of Rheumatic Diseases Poster II: Ultrasound

Session Type: ACR Poster Session B

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

Background/Purpose: The literature on sonographic enthesitis is primarily based on the large enthesis, ignoring the involvement of the small enthesis such as the hands. In this study, we aimed to determine the prevalence of entheseal abnormalities in small enthesis of the hands in healthy subjects and explore factors that are contributing to the occurrence of these findings.

Methods: Healthy subjects who had no joint pain, recent joint trauma or surgery had US scans of the flexor and extensor tendon insertions to the DIP and extensor tendon insertions to the middle phalanx at the level of the PIP, on the 3rd digits, on both hands. The enthesis were scored as present or absent for elementary lesions of enthesitis (hypoechogenicity, thickening, Doppler signals, enthesophytes, erosions and calcifications) and osteophytes were also recorded.

Results: Within 80 healthy subjects (mean age: 45.0 ± 16.1; 62.5% female) 8 had OA. The enthesophytes were the most frequent elementary lesion of enthesitis that could also be seen in the absence of other lesions and were detected in 15% of the DIP extensor tendon insertions, 3.75% of the DIP flexor tendon insertions and 3.75% of the PIP extensor tendon insertions (Figures 1 and 2). 41% of the patients with enthesophytes at the DIP extensor tendon insertion also had osteophytes at the same site, which was significant higher than people without any enthesophytes (5/12 vs 1/68 p<0.001). Patients with enthesophytes were older (67.5 ± 12.6 vs 41.3 ± 13.3; p<0.001) and more frequently men (8/12 vs 22/68; p:0.048). The other elementary lesions were seen in the minority of the digits (Figure 1).

Conclusion: Enthesophytes of the small enthesis are frequent in healthy people and these lesions can be seen in the absence of other elementary lesions. It can be challenging to differentiate enthesophytes from osteophytes at the level of the DIP joints. Therefore the definition of enthesitis for the small enthesis may exclude enthesophytes not to overcall patients with enthesitis. The other features of enthesitis were not common in healthy people, suggesting a good specificity to reflect pathology when detected, however studies on disease groups are needed to clarify.

Açýklama: C:\Users\Asus\Desktop\ottawa studies\healthy\hand 1.jpg

Figure 1. Elementary lesions of enthesitis on extensor and flexor tendon insertions at the DIP joint and flexor tendon insertion at the PIP joint level.

Açýklama: C:\Users\Asus\Desktop\ottawa studies\healthy\figure hand.jpg

Figure 2.  Longitudinal scans of the extensor tendon insertion to the distal phalanx. A: A healthy enthesis B: Thickening and hypoechogenicity with enthesophyte as well as an osteophyte. MP: Middle Phalanx; DP: Distal Phalanx; o: osteophyte; e: enthesophyte

                        


Disclosure: S. Bakirci, None; D. Solmaz, None; W. Stephenson, None; L. Eder, None; J. Roth, None; S. Z. Aydın, None.

To cite this abstract in AMA style:

Bakirci S, Solmaz D, Stephenson W, Eder L, Roth J, Aydın SZ. The Evaluation of the Small Enthesis of the Hands By Ultrasound: A Study on Healthy Subjects [abstract]. Arthritis Rheumatol. 2018; 70 (suppl 9). https://acrabstracts.org/abstract/the-evaluation-of-the-small-enthesis-of-the-hands-by-ultrasound-a-study-on-healthy-subjects/. Accessed .
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