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      The evaluation of nailfold capillaroscopy pattern in patients with fibromyalgia

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          Abstract

          Objectives

          This study aims to evaluate nailfold capillaroscopic pattern in patents with fibromyalgia and to assess the relation of capillaroscopic parameters with clinical variables and disease-related measures.

          Patients and methods

          This cross-sectional, case-control study included 60 participants (4 males, 56 females; mean age: 44.0±8.2 years; range, 26 to 64 years) between August 2019 and November 2019. All participants were divided into two groups as the primary fibromyalgia group (n=30) who met the 2016 modified American College of Rheumatology Diagnostic Criteria for Fibromyalgia and the control group (n=30) consisting of age- and sex-matched healthy individuals. Nailfold capillaroscopy was performed by a digital microscope under a magnification of 200X. Capillary density, capillary loop diameter, number of dilated, giant and neoangiogenic capillaries, capillary shape, number of avascular areas, micro-aneurysms and micro-hemorrhages were evaluated by an assessor who was blind to the group allocation. In the fibromyalgia group, Widespread Pain Index, Symptom Severity Scale scores, and Fibromyalgia Severity scores were calculated. Health status and presence of benign joint hypermobility syndrome (BJHS) were evaluated using the Fibromyalgia Impact Questionnaire (FIQ) and revised Brighton criteria, respectively.

          Results

          Of the capillaroscopic parameters, the mean capillary loop diameter, number of micro-aneurysms, avascular areas, and neoangiogenic capillaries were significantly higher in the patient group compared to the controls (p<0.001, p=0.016, p=0.038, and p=0.04, respectively). Nailfold capillaroscopic findings did not significantly differ between the patients with (n=16) and without concomitant BJHS (n=14). Of the disease-related measures, only FIQ score showed a weak correlation with the number of dilated capillaries (p=0.324).

          Conclusion

          Patients with fibromyalgia have distinct capillaroscopic patterns than healthy population. Capillaroscopic features, in general, are not related to clinical variables and disease-related measures.

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          Most cited references36

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          2016 Revisions to the 2010/2011 fibromyalgia diagnostic criteria.

          The provisional criteria of the American College of Rheumatology (ACR) 2010 and the 2011 self-report modification for survey and clinical research are widely used for fibromyalgia diagnosis. To determine the validity, usefulness, potential problems, and modifications required for the criteria, we assessed multiple research reports published in 2010-2016 in order to provide a 2016 update to the criteria.
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            The fibromyalgia impact questionnaire: development and validation.

            An instrument has been developed to assess the current health status of women with the fibromyalgia syndrome. The Fibromyalgia Impact Questionnaire (FIQ) is a brief 10-item, self-administered instrument that measures physical functioning, work status, depression, anxiety, sleep, pain, stiffness, fatigue, and well being. We describe its development and validation. This initial assessment indicates that the FIQ has sufficient evidence of reliability and validity to warrant further testing in both research and clinical situations.
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              Hypoxia, oxidative stress and inflammation

              Inflammatory Arthritis is characterized by synovial proliferation, neovascularization and leukocyte extravasation leading to joint destruction and functional disability. Efficiency of oxygen supply to the synovium is poor due to the highly dysregulated synovial microvasculature. This along with the increased energy demands of activated infiltrating immune cells and inflamed resident cells leads to an hypoxic microenvironment and mitochondrial dysfunction. This favors an increase of reactive oxygen species, leading to oxidative damage which further promotes inflammation. In this adverse microenvironment synovial cells adapt to generate energy and switch their cell metabolism from a resting regulatory state to a highly metabolically active state which allows them to produce essential building blocks to support their proliferation. This metabolic shift results in the accumulation of metabolic intermediates which act as signaling molecules that further dictate the inflammatory response. Understanding the complex interplay between hypoxia-induced signaling pathways, oxidative stress and mitochondrial function will provide better insight into the underlying mechanisms of disease pathogenesis.
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                Author and article information

                Journal
                Arch Rheumatol
                Arch Rheumatol
                Archives of Rheumatology
                Turkish League Against Rheumatism
                2148-5046
                2618-6500
                September 2021
                15 January 2021
                : 36
                : 3
                : 341-348
                Affiliations
                [1 ] Department of Physical Medicine and Rehabilitation, Çukurova University Faculty of Medicine, Adana, Turkey
                [2 ] Department of Internal Medicine, Division of Rheumatology, Çukurova University Faculty of Medicine, Adana, Turkey
                Author notes
                İlke Coşkun Benlidayı, MD. Çukurova Üniversitesi Tıp Fakültesi Fiziksel Tıp ve Rehabilitasyon Anabilim Dalı, 01790 Sarıçam, Adana, Türkiye. Tel: +90 538 - 545 39 37 icbenlidayi@ 123456hotmail.com .
                Author information
                http://orcid.org/0000-0001-6517-5969
                http://orcid.org/0000-0002-3570-875X
                http://orcid.org/0000-0002-8835-4203
                Article
                10.46497/ArchRheumatol.2021.8359
                8612485
                648120ae-6a10-430e-9c09-882a6e5cd59d
                Copyright © 2021, Turkish League Against Rheumatism

                This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

                History
                : 04 August 2020
                : 01 December 2020
                Categories
                Original Article

                capillaries,capillaroscopy,fibromyalgia,nailfold capillaroscopy

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