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Journal of Korean Neurosurgical Society 1997;26(7): 961-970.
The Prognostic Implications of Radiological Findings after Laminoplasty in Cervical Myelopathy Patients.
Seok Joon Kim, Jun Hyeok Song, Myung Hyun Kim, Hyang Kwon Park, Sung Hak Kim, Kyu Man Shin, Dong Been Park
Department of Neurosurgery, Ewha Women's University, Seoul, Korea.
In order to define the prognostic implications of cervical myelopathy, we conducted a morphometrical analysis of spinal cords in patients suffering from this condition. Twenty patients who had undergone laminoplasty for their cervical myelopathy were the subject of this study. Cervical spondylosis was diagnosed in 14 patients and ossification of the posterior longitudinal ligament in six. Signal change of the spinal cord, its anteroposterior diameter, and the number of stenotic segments were determined by pre- and postoperative magnetic resonance imaging and simple X-ray. The patients' neurological status before and after surgery was evaluated by the Neurosurgical Cervical Scale. Patients whose cord revealed no signal change had better recovery rates than those who showed change (77.5% vs. 60.5%). The wider the diameter of the cord, the better the outcome of surgery(p<0.05 on one-way ANOVA). The number of stenotic segments was not significantly related to recovery rate. In conclusion, focal morphological changes of the spinal cord, regardless of the general stenotic area, are the main factors determining the outcomes of surgery.
Key Words: Laminoplasty; Myelopathy; Morphometry; Recovery rate
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