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Periacetabular osteotomy in patients with Down's syndrome.

Katz DA, Kim YJ, Millis MB

Department of Orthopaedic Surgery, Children's Hospital, 300 Longwood Avenue, Boston, MA 02115, USA. katzdortho@aol.com

We treated eight dysplastic acetabula in six skeletally mature patients with Down's syndrome by a modified Bernese periacetabular osteotomy. The mean age at the time of surgery was 16.5 years (12.8 to 28.5). Mean length of follow-up was five years (2 to 10.4).Pre-operatively the mean (Tonnis) acetabular angle was 28 degrees, the centre-edge angle was -9 degrees, and the extrusion index was 60%; post-operatively they were 3 degrees, 37 degrees, and 17%, respectively. Two patients with post-operative (Tonnis) acetabular angles > 10 degrees developed subluxation post-operatively and required secondary varus derotation femoral osteotomies. Another patient developed a late labral tear which was treated arthroscopically. All eight hips remain clinically stable, and are either asymptomatic or symptomatically improved.These results suggest that the modified Bernese periacetabular osteotomy can be used successfully in the treatment of acetabular dysplasia in patients with Down's syndrome.

Published 29 March 2005 in J Bone Joint Surg Br, 87(4): 544-7.
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