To qualify for the Frozen Shoulder syndrome study, patients must have unilateral idiopathic adhesive capsulitis of the shoulder with restricted range of motion in the affected shoulder for at least three months, but not more than 12 months. Following screening and determination of study eligibility, subjects will be assigned to four groups that vary in dosing (injection volume and concentration) or a fifth group receiving shoulder exercises only. Patients may receive up to three ultrasound-guided injections of varying doses of XIAFLEX (ranging from 0.29 mg to 0.58 mg in varying concentrations) separated by a minimum of 21 days and all patients will be instructed to perform home shoulder exercises. The study's primary endpoint is the change (degrees) from baseline to the day 92 follow-up in forward flexion (active) in the affected shoulder. Safety assessments, including immunogenicity testing, will be made during all study visits. More information on the study, including study sites participating in this trial, can be found at clinicaltrials.gov.
About Frozen Shoulder SyndromeFrozen Shoulder syndrome, also known as idiopathic adhesive capsulitis, is a common, prolonged, and painful disorder of diminished shoulder motion.(1) The full duration of the frozen stage of disease can last from 1 to 3.5 years with a mean of 30 months.(4) Increased capsular collagen thickening and subsequent capsular contraction in the glenohumeral joint is thought to cause restriction in both active and passive range of motion in the shoulder.(3) As the condition progresses, pain can become more severe and is accompanied by stiffness and decreased range of motion. The stiffening may increase to the point where the natural arm swing that accompanies normal gait is lost.(1) The most common treatments for Frozen Shoulder syndrome are long-term intensive physical therapy, corticosteroids, manipulation under anesthesia and/or arthroscopic release, but the long-term outcomes literature uses varying endpoints and each treatment has differing associated risks. Drugs are often used to manage associated pain, but none have been demonstrated to have an impact on Frozen Shoulder syndrome.
Frozen Shoulder syndrome is estimated to affect approximately two percent of the general adult population(3) and has an increased incidence among patients with diabetes(5), Dupuytren's contracture, and thyroid disease. It tends to occur in a patient's fourth to sixth decade of life.(1) The condition occurs slightly more often in women than in men, often presents bilaterally and commonly affects the contralateral side years after onset of symptoms in the first shoulder, but it does not typically affect the same shoulder twice.(3)
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