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Journal of Bone and Joint Surgery - British Volume, Vol 88-B, Issue 9, 1192-1196.
doi: 10.1302/0301-620X.88B9.17758  
Copyright © 2006 by British Editorial Society of Bone and Joint Surgery
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MRI study of the lumbar spine in achondroplasia

A MORPHOMETRIC ANALYSIS FOR THE EVALUATION OF STENOSIS OF THE CANAL

S.-T. Jeong, MD, PhD, Associate Professor1; H.-R. Song, MD, PhD, Professor2; S. M. Keny, MS, Fellow2; S. S. Telang, MS, DNB, Fellow2; S.-W. Suh, MD, PhD, Associate Professor2; and S.-J. Hong, MD, PhD, Associate Professor3

1 Department of Orthopaedics, Gyeong-Sang National, University, Jinju, Korea.
2 Department of Orthopaedics, Rare Disease Institute
3 Department of Radiology, Korea University, Guro Hospital, # 80, Guro-Dong, Guro-Gu, Seoul 152-703, Korea.

Correspondence should be sent to Dr H.-R. Song; e-mail: songhae{at}korea.ac.kr

We carried out an MRI study of the lumbar spine in 15 patients with achondroplasia to evaluate the degree of stenosis of the canal. They were divided into asymptomatic and symptomatic groups. We measured the sagittal canal diameter, the sagittal cord diameter, the interpedicular distance at the mid-pedicle level and the cross-sectional area of the canal and spinal cord at mid-body and mid-disc levels.

The MRI findings showed that in achondroplasia there was a significant difference between the groups in the cross-sectional area of the body canal at the upper lumbar levels. Patients with a narrower canal are more likely to develop symptoms of spinal stenosis than others.






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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General