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An Unusual Complication after Shoulder Hemiarthroplasty

DOI: 10.1155/2013/759193

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Abstract:

Hemiarthroplasty of the shoulder can be a safe and an effective treatment for pain in patients with rheumatoid arthritis. Many complications have been previously described in the literature; the most common of which are dislocation, loosening, periprosthetic fractures, and infection. We report a patient who presented with a discharging sinus over the tip of the acromium which was created by the displacement of the prosthesis and erosion of the AC joint and distal clavicle. The erosion of the distal clavicle and AC joint caused the remaining proximal clavicle to become mobile and displaced posteriorly; this spike of clavicle was then able to penetrate the trapezius muscle and eventually the skin causing an aseptic sinus. This was successfully treated with the exploration and excision of the distal 2?cm of the clavicle. 1. Introduction Shoulder hemiarthroplasty can be an effective way of treating arthritis, and, in the UK, approximately 1500 are performed each year [1]. Shoulder hemiarthroplasty is primarily performed as a pain relieving procedure in arthritis with improvements in function usually noted [2] or as a primary treatment for certain severe grades of proximal humerus fractures. 2. Case Report The patient in question was a 90-year-old female who suffered with a destructive form of erosive rheumatoid arthritis. At the time of her presentation she was living alone in a 3-bedroom flat with a substantial package of care and had become in recent months almost wheelchair bound. At the age of 76, she had a left Neer shoulder hemiarthroplasty for avascular necrosis of her humeral head following a dislocation. For 10 years she had satisfactory level of function and was pain-free; however, at the age of 86, she was experiencing pain in her shoulder as was seen in the out-patient clinic. Clinically, she had severe rotator cuff dysfunction with anterior and superior displacement of the prosthesis, but no intervention was recommended at this time. The patient then represented at the age of 89 with a 6-week history of her left shoulder becoming increasingly painful and stiff and with a small discharging wound over the posterior aspect of her left shoulder. On presentation, the patient was apyrexial with normal observations and felt systemically well. There was a 1?cm sinus over the posterior aspect of her shoulder in the supra-spinatus fossa just medial to the acromium process. The wound was discharging moderate amounts of serous fluid which was causing the patient some distress and also skin irritation. She was seen by her GP who organised some

References

[1]  M. Ravenscroft and P. Calvert, “Utilisation of shoulder arthroplasty in the UK,” Annals of the Royal College of Surgeons of England, vol. 86, no. 1, pp. 25–28, 2004.
[2]  T. R. Norris and J. P. Iannotti, “Functional outcome after shoulder arthroplasty for primary osteoarthritis: a multicenter study,” Journal of Shoulder and Elbow Surgery, vol. 11, no. 2, pp. 130–135, 2002.

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