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Adhesive Capsulitis
Adhesive capsulitis usually happen to people above fifty years old and hence commonly known as “50 shoulder”. It is also called “frozen shoulder” because people with the disorder are unable to move their arms as if they were frozen. It is clinically known as “adhesive capsulitis,” a kind of shoulder capsule inflammation. Inflammation around glenohumeral joint causes pain and limited joint rotation which affect daily life.

Calcific tendinitis is a disorder characterized by deposits of hydroxyapatite in any tendon of the body, causing repeated inflammation. Approximately 70% of patients have it in the tendons of shoulder, but tendon calcification may also occur to hip joint, elbow, wrist, and knee joint. Clinical symptoms of calcific tendinitis in shoulder include restricted shoulder movement, severe pain when rotating to a certain angel, and 24-hour throbbing pain in the shoulder. The symptoms may cause the arms unable to rise, numbness, and painful.

Given the similar affected regions and clinical symptoms, calcific tendinitis is often confused with frozen shoulder. The difference lies in that frozen shoulder is caused by inflammation due to shoulder joint degeneration or injuries; whereas calcific tendinitis results from tendon calcification, and the pain is often severer than frozen shoulder. Tendonitis in shoulder may develop to frozen shoulder if not treated in time.
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