Acta Orthop Belg
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Case Reports
Isolated synovial cyst of the acromio-clavicular joint associated with joint degeneration and an intact rotator cuff.
The majority of acromioclavicular joint cysts are the manifestation of underlying pathology of the rotator cuff. A chronic rotator cuff tear should be the first option in differential diagnosis, when facing such a condition, although this is not always the case. A case of a 67-year-old male patient, who abruptly developed a painless lump over his right acromioclavicular joint, is presented. ⋯ Surgical treatment, with cyst removal and resection of the distal end of the clavicle, was performed. The lesion was proved to be a synovial cyst. Eighteen months postoperatively, the patient was asymptomatic and no recurrence of the cyst was evident.