|
Journal of Bone and Joint Surgery - British Volume, Vol 87-B, Issue 8,
1127-1133.
doi: 10.1302/0301-620X.87B8.15790 Copyright © 2005 by British Editorial Society of Bone and Joint Surgery The bicompartmental acetabulum in Perthes disease3D-CT AND MRI STUDYT.-J. Cho, MD, Associate Professor1; I. H. Choi, MD, Professor1; C. Y. Chung, MD, Associate Professor2; W. J. Yoo, MD, Assistant Professor1; and K. S. Lee, MD, Clinical Fellow1
1 Department of Orthopaedic Surgery, Seoul National University, Childrens Hospital, 28, Yeongeon-dong Jongno-gu, Seoul 110-744, Korea. Correspondence should be sent to Professor I. H. Choi; e-mail: inhoc{at}snu.ac.kr
The bicompartmental acetabulum is one of the morphological changes which may be seen in children with Legg-Calvé-Perthes disease. Three-dimensional CT and MRI were used to analyse the detailed morphology of the acetabulum with special reference to its inner surface, in 16 patients with Perthes disease and a bicompartmental acetabulum. The bicompartmental appearance was seen on the coronal plane image through the acetabular fossa. The lunate surface was seen to grow laterally resulting in an increased mediolateral thickness of the triradiate cartilage. On the horizontal plane images, the acetabular fossa had deepened and had a distinct prominence at its posterior border. The combination of these morphological changes resulted in a bicompartmental appearance on plain radiography. Acetabular bicompartmentalisation appears to be the result of an imbalance of growth between the cartilage-covered lunate surface and the cartilage-devoid acetabular fossa.
|
|


