New classification system for ossification of the posterior longitudinal ligament using CT images

Yoshiharu Kawaguchi, Morio Matsumoto, Motoki Iwasaki, Tomohiro Izumi, Atsushi Okawa, Shunji Matsunaga, Kazuhiro Chiba, Takashi Tsuji, Masashi Yamazaki, Takahito Fujimori, Toshitaka Yoshii, Yoshiaki Toyama

研究成果: ジャーナルへの寄稿学術論文査読

26 被引用数 (Scopus)

抄録

Background: Ossification of the posterior longitudinal ligament (OPLL) is most frequently seen in the cervical spine. The types of cervical OPLL are classified into continuous, mixed, segmental, and other based on plain lateral X-ray. Computed tomography (CT) imaging is often used in clinical practice for evaluating ossified lesions as it can detect their precise location, size, and shape. However, to date, no CT classification of OPLL lesions has been proposed. Methods: One hundred and forty-four patients diagnosed with cervical OPLL by plain radiograph were included in this study. Sagittal and axial CT images of the cervical spine were obtained. We propose three classification systems: A, B, and axial. Classification A comprises two lesion types: bridge and nonbridge. Classification B requires examiners to describe all vertebral and intervertebral levels where OPLL exits in the cervical spine. Axial classification comprises central and lateral lesions identified on axial CT images. Seven observers evaluated CT images using this classification system, and intra- and interrater reliability were examined. Results: Averaged Fleiss' kappa coefficient of interrater agreement was 0.43 ± 0.26 among the seven observers, averaged intrarater reliability for the existence of OPLL was 72.4 ± 8.8 % [95 % confidence interval (CI) 67.5-76.8]. Fifty-four patients (37.5 %) had the bridge type and 90 the nonbridge type according to Classification A; 102 (70.8 %) had central and 42 (29.2 %) lateral OPLL in the axial classification. Four representative cases defined according to the three classification types are reported here. Conclusion: Subcommittee members of the Investigation Committee on the Ossification of the Spinal Ligaments of the Japanese Ministry of Public Health and Welfare propose three new classification systems of cervical OPLL based on CT imaging: A, B, and axial.

本文言語英語
ページ(範囲)530-536
ページ数7
ジャーナルJournal of Orthopaedic Science
19
4
DOI
出版ステータス出版済み - 07-2014
外部発表はい

All Science Journal Classification (ASJC) codes

  • 外科
  • 整形外科およびスポーツ医学

フィンガープリント

「New classification system for ossification of the posterior longitudinal ligament using CT images」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル