Definition: Gradual development of global limitation of both active and passive shoulder motion, characterized by severe pain and lack of radiographic findings
Idiopathic loss of BOTH active and passive motion (significant reduction of at least 50%)
Motion is stiff and painful especially at the extremes.
Occurs due to thickening and contracture of the shoulder capsule.
Affects up to 8-10% of people of working age.
Affects patients between the ages of 40 and 60.
Peak age mid 50s
Onset before 40 is rare (consider other diagnosis).
Affects women more than men.
Diabetes is the most common risk factor.
Patients with DM, suffer a more prolonged course and are more resistant to therapy
Also associated with thyroid disease and prolonged immobilization
Increased risk following trauma to shoulder region (rotator cuff tear, following shoulder surgery, fracture of proximal humerus)
Presents unilaterally (other shoulder may become involved in next 5 years)
