Distal clavicle osteolysis is shoulder joint pain at the end of the collarbone that is the result of bone disintegration and damage. The most common symptom is a sharp or aching pain at the junction of the acromioclavicular joint (AC joint) and collarbone. While the pain is usually felt during activity, there may also be a persistent tenderness around the joint during non-activity. Inflammation and swelling are also common manifestations.

Source: Verywell Health

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