The Journal of Bone and Joint Surgery, Vol 75, Issue 12 1790-1794, Copyright © 1993 by Journal of Bone and Joint Surgery, Inc
Treatment of cysts of the acromioclavicular joint with shoulder hemiarthroplasty
GI Groh, TM Badwey and CA Rockwood
Department of Orthopaedic Surgery, University of Texas Health Science Center at San Antonio 78284.
A chronic cyst overlying the acromioclavicular joint was managed in four
patients, between July 1988 and September 1991. All patients had had
previous unsuccessful aspiration and excision of the cyst with recurrence.
Each cyst was associated with a chronic, massive defect of the rotator
cuff; superior migration of the humeral head; and degenerative
osteoarthrosis of the glenohumeral joint. All patients had complained of
pain and limitation of motion (mean forward elevation, 95 degrees; mean
external rotation, 20 degrees; and mean internal rotation, to the spinous
process of the second lumbar vertebra). All procedures consisted of a
large-humeral-head hemiarthroplasty, with no operative treatment directed
at the cyst or the acromioclavicular joint. At an average of twenty-seven
months (range, fifteen to thirty-six months) after the operation, the
patients were all pain-free and had not had a recurrence of the cyst. The
average postoperative range of motion was 130 degrees of forward elevation,
30 degrees of external rotation, and internal rotation to the spinous
process of the first lumbar vertebra.
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