Subcutaneous Acromial Bursa

bursa acromialis subcutanea

The subcutaneous acromial bursa lies between the acromion tip and the overlying skin at the lateral shoulder, distinct from the subacromial bursa which is deep to the deltoid. It can become inflamed from direct pressure on the lateral shoulder during prolonged lying or repetitive pressure. The subacromial bursa is the clinically significant bursa for shoulder impingement; the subcutaneous acromial bursa is a minor structure.

Region: Shoulder

Biomechanics

Function & Actions

Reduces friction between the skin and the bony acromion prominence during arm movements

Clinical Relevance

Clinical Notes

Subcutaneous acromial bursitis from direct pressure is uncommon and usually managed conservatively. It must be distinguished from subacromial bursitis by its superficial location and provocation by direct pressure rather than arm movement. Septic bursitis of the subcutaneous acromial bursa is rare but requires aspiration for culture when infected.

Pathology

Common Injuries & Conditions

Subcutaneous Acromial Bursitis

Pressure bursitis over the acromion tip producing lateral shoulder tenderness managed with padding and activity modification.