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KMID : 1145220230200030921
Neurospine
2023 Volume.20 No. 3 p.921 ~ p.930
Correlation Between the Severity of Multifidus Fatty Degeneration and the Size of Ossification of Posterior Longitudinal Ligament at Each Spinal Level
Park Jin-Young

Cho Yong-Eun
Kim Kyung-Hyun
Shin Sang-Hoon
Kim Sung-Jun
Lim Chae-Hwan
Chung Seok-Young
Park Yoon-Ghil
Abstract
Objective : This study aimed to investigate the correlation between ossification of the posterior longitudinal ligament (OPLL) size and multifidus fatty degeneration (MFD), hypothesizing that larger OPLL sizes are associated with worse MFD.

Methods : One hundred four patients with cervical OPLL who underwent surgery were screened. OPLL occupying diameter and area ratios, the severity of MFD using the Goutallier classification, and range of motion (ROM) of cervical flexion-extension (¥ÄCobb) were measured. Correlation analyses between OPLL size, MFD severity, and ¥ÄCobb were conducted. MFD severity was compared for each OPLL type using one-way analysis of variance.

Results : The final clinical data from 100 patients were analyzed. The average Goutallier grade of C2?7 significantly correlated with the average OPLL diameter and area occupying ratios, and OPLL involved vertebral level (r = 0.58, p < 0.01; r = 0.40, p < 0.01; r = 0.47, p < 0.01, respectively). The OPLL size at each cervical level significantly correlated with MFD of the same or 1?3 adjacent levels. ¥ÄCobb angle was negatively correlated with the average Goutallier grade (r = -0.31, p < 0.01) and average OPLL occupying diameter and area ratios (r = -0.31, p < 0.01; r = -0.35, p < 0.01, respectively). Patients with continuous OPLL exhibited worse MFD than those with segmental OPLL (p < 0.01).

Conclusion : OPLL size is clinically correlated with MFD and cervical ROM. OPLL at one spinal level affects MFD at the same and 1?3 adjacent spinal levels. The worsening severity of MFD is associated with the longitudinal continuity of OPLL.
KEYWORD
Cervical spine, Multifidus, Ossification of posterior longitudinal ligament, Paraspinal muscles, Range of motion, Spinal canal
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