A small dorsal bursa over the little finger proximal interphalangeal joint, between the extensor mechanism and the joint capsule. It is prone to repeated minor trauma from ring-wearing positions and from keyboard use.
Little finger PIP dorsal bursitis produces a dorsal little finger knuckle swelling in musicians, typists, and people who wear rings on the little finger. It must be distinguished from PIP joint effusion in inflammatory arthropathy and from a giant cell tumour of the tendon sheath. Aspiration and padding provide relief.
Bursal swelling at the little finger PIP dorsum from repetitive ring compression producing a soft dorsal swelling, managed by ring removal and aspiration.
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