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Updated: Jul 10, 2026
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Modified Posterior Vertebral Column Resection for Patients with Thoracolumbar Kyphotic Deformity
Published on: September 16, 2022
Lumbar degenerative kyphosis: radiologic analysis and classifications.
Jee-Soo Jang1, Sang-Ho Lee, Jun-Hong Min
1Department of Neurosurgery, Gimpo Airport Wooridul Spine Hospital, Seoul, Korea. spinejjs@yahoo.co.kr
Spine
|November 17, 2007
Summary
The thoracolumbar junction angle helps classify lumbar degenerative kyphosis (LDK) by revealing thoracic compensatory mechanisms. This classification aids in determining appropriate fusion levels for LDK treatment.
Area of Science:
- Orthopedics
- Spinal Surgery
- Radiographic Analysis
Background:
- Lumbar degenerative kyphosis (LDK) is a prevalent spinal deformity in Asian populations.
- Limited research exists on LDK classification and treatment strategies.
Purpose of the Study:
- To review radiographic classifications for sagittal imbalance in LDK.
- To determine the correlation between thoracic and lumbar spinal curves in LDK patients.
Main Methods:
- Retrospective analysis of 78 LDK patients.
- Classification based on standing lateral whole spine imaging.
- Measurement of lumbar lordosis, thoracic kyphosis, sacral slope, thoracolumbar angle, and sagittal vertical axis (SVA).
Main Results:
- Group 1 (flat/lordotic thoracolumbar angle) showed strong thoracic-lumbar curve correlation, indicating sagittal thoracic compensation.
- Group 2 (kyphotic thoracolumbar angle) lacked thoracic-lumbar correlation, indicating sagittal thoracic decompensation.
- Significant difference in SVA observed between the two groups.
Conclusions:
- The thoracolumbar junction angle is crucial for identifying sagittal thoracic compensatory mechanisms in LDK.
- Understanding compensatory mechanisms is key for selecting optimal fusion levels in LDK treatment.
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