The medial epicondyle bursa is a small subcutaneous bursa overlying the medial epicondyle of the humerus. It develops as an adventitial structure in response to direct pressure, most commonly in individuals whose work or activity involves prolonged elbow contact against hard surfaces. It is distinct from the olecranon bursa, which overlies the posterior elbow.
| Location | Between the skin and the medial epicondyle of the humerus |
|---|---|
| Nearby |
|
Allows the skin over the medial elbow to move freely over the bony medial epicondyle
Medial epicondyle bursitis presents as a fluctuant swelling directly over the medial epicondyle, often associated with pressure from a workbench or armrest. Aspiration is both diagnostic and therapeutic. Septic bursitis must be excluded. The proximity of the ulnar nerve in the cubital tunnel adds complexity, as swelling can occasionally compress the nerve, and injection requires care to avoid neural injury.
Adventitial bursal swelling from repetitive pressure over the medial epicondyle, producing a tender fluctuant mass that can mimic medial epicondylopathy; aspiration reveals clear straw-coloured fluid distinguishing it from septic bursitis.
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