A small bursa between the ECRB tendon and the radial head may become inflamed in lateral epicondylalgia, contributing to the pain at the lateral epicondyle region. Radiohumeral bursitis is rarely the primary pathology in lateral elbow pain but can coexist with ECRB tendinopathy. Its identification on MRI or ultrasound helps distinguish pure tendinopathy from combined tendinopathy-bursitis presentations.
Reduces friction between the ECRB tendon and the radial head during forearm rotation
Radiohumeral bursitis contributes to lateral elbow pain in some patients with lateral epicondylalgia — distinguished by bursal fluid on ultrasound at the radial head level separate from tendon signal changes. Injection targeting both the tendon and bursa provides diagnostic information about the relative contribution of each structure.
Radial head bursal inflammation coexisting with ECRB tendinopathy contributing to lateral elbow pain managed with combined injection and loading rehabilitation.
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