The lateral epicondylar bursa is a small subcutaneous bursa over the lateral elbow. Its inflammation is distinct from lateral epicondylalgia (tennis elbow) — bursitis produces a soft fluctuant swelling over the lateral epicondyle rather than the deep tender enthesis of epicondylalgia. Direct pressure, repeated forearm resting on hard surfaces, and inflammatory arthritis can all produce lateral epicondylar bursitis.
Reduces skin friction over the lateral epicondyle during repeated forearm flexion-extension
Lateral epicondylar bursitis is distinguished from tennis elbow by: (1) a palpable soft fluctuant swelling over the bone, (2) pain from direct pressure rather than resisted wrist extension, (3) no Cozen or Mill test positivity. Aspiration of the bursal fluid confirms the diagnosis and differentiates from infection.
Subcutaneous bursal inflammation over the lateral epicondyle managed with aspiration and padding — distinct from lateral epicondylalgia.
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