An observational study in Lateral Epicondylitis and Lateral Elbow Tendinopathy (Tennis Elbow), sponsored by Marmara University. Recruiting at 1 site in Turkey (Türkiye). Open to participants aged 18 Years to 60 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-01-02.
Sponsored by Marmara University · Observational
Lateral epicondylitis (LE) is the tendinopathy of the common extensor tendon. Although exact etiology remains unclear, it is believed to be caused by overuse.
Even though, genetics factor related to tendinopathies were defined accompanying tendinopathies in patients with LE is yet to be studied.
Madrid sonographic enthesitis index (MASEI) is an ultrasound based scoring system, developed for the evaluation of the enthesitis. Initially developed for ankylosing spondylitis, its usage has also become widespread in other musculoskeletal diseases.
The aim of this study is to calculate the MASEI score in patients diagnosed with LE, and compare it to healthy volunteers.
284 studies on the registry are indexed under Tennis Elbow; 60 are open to participants now.
This study's planned enrollment of 60 is below the median of 75 across 26 observational studies indexed under Tennis Elbow.
Browse Tennis Elbow studies →Marmara University is the lead sponsor of 576 studies on the registry; 136 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Patients presented to the outpatient clinic of Physical Medicine and Rehabilitation of Marmara University with elbow pain and diagnosed with lateral epicondylitis will be informed about the study. Willing patients will be enrolled after written consent is taken.
Control group will be chosen with volunteers, which have similar demographic characteristics.
Exclusion Criteria:
Patients with lateral epicondylitis will be included in this group.
Diagnostic Test: Madrid Sonographic Enthesitis Index
Healthy volunteers with similar demographic characteristics will be enrolled to this group.
Diagnostic Test: Madrid Sonographic Enthesitis Index
Patients will be evaluated with ultrasound at 6 different locations on each side, for total of 12 locations. These will be insertion points of triceps brachii tendon, quadriceps tendon, proximal and distal patellar tendons, achilles tendon and the plantar fascia. Evaluation parameters are the structure and thickness of the tendon, the presence of calcifications or enthesophytes, erosions in the bone, regional bursitis, and the presence of power-Doppler signal in the entheses.
Also known as: MASEI
Madrid Sonographic Enthesitis Index
Patients will be evaluated with ultrasound at 6 different locations on each side, for total of 12 locations. At each location; structure and thickness of the tendon, the presence of calcifications or enthesophytes, erosions in the bone, regional bursitis, and the presence of power-Doppler signal will be noted. Each parameter has a point of its own. Points obtained from each parameter will be added and total MASEI score (0-136) will be calculated. Higher scores indicate the presence of enthesitis.
Time frame: At enrollment
Plan to share: No — Due to legal restrictions, all data will be anonymized. Individual participant data won't be shared to third parties.
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