Prevalence and Distribution of Ossified Lesions in the Whole Spine of Patients with Cervical Ossification of the Posterior Longitudinal Ligament A Multicenter Study (JOSL CT study)

• Takashi Hirai,

  Affiliations Department of Orthopedic Surgery, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo Ward, Tokyo, 113–8519, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Toshitaka Yoshii ,

  * E-mail: yoshii.orth@tmd.ac.jp

  Affiliations Department of Orthopedic Surgery, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo Ward, Tokyo, 113–8519, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Akio Iwanami,

  Affiliations Department of Orthopedic Surgery, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku Ward, Tokyo, 160–8582, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Kazuhiro Takeuchi,

  Affiliations Department of Orthopedic Surgery, National Hospital Organization Okayama Medical Center, 1711–1 Tamasu, Okayama, Okayama, 701–1154, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Kanji Mori,

  Affiliations Department of Orthopedic Surgery, Shiga University of Medical Science, Tsukinowa-cho, Seta, Otsu, Shiga, 520–2192, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Tsuyoshi Yamada,

  Affiliations Department of Orthopedic Surgery, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo Ward, Tokyo, 113–8519, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Kanichiro Wada,

  Affiliations Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, 53 Honcho, Hirosaki, Aomori, 036–8203, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Masao Koda,

  Affiliations Department of Orthopedic Surgery, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo Ward, Chiba, Chiba, 260–0856, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Yukihiro Matsuyama,

  Affiliations Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, Shizuoka, 431–3125, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Katsushi Takeshita,

  Affiliations Department of Orthopedics, Jichi Medical University, 3311–1 Yakushiji, Shimotsuke, Tochigi, 329–0498, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Masahiko Abematsu,

  Affiliations Department of Orthopedic Surgery, Graduate School of Medicine and Dental Science, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, Kagoshima, 890–8520, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Hirotaka Haro,

  Affiliations Department of Orthopedic Surgery, University of Yamanashi, 1110 Shimokato, Chuo Ward, Yamanashi, 409–3898, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Masahiko Watanabe,

  Affiliations Department of Orthopedic Surgery, Surgical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259–1143, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Kei Watanabe,

  Affiliations Department of Orthopedic Surgery, Niigata University Medicine and Dental General Hospital, 1–754 Asahimachidori, Chuo Ward, Niigata, Niigata, 951–8520, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Hiroshi Ozawa,

  Affiliations Department of Orthopaedic Surgery, Tohoku Medical and Pharmaceutical University, 1-12-1 Fukumuro Miyaginoku, Sendai, 983–8512, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Haruo Kanno,

  Affiliations Department of Orthopaedic Surgery, Tohoku University School of Medicine, 1–1 Seiryomachi, Aoba Ward, Sendai, Miyagi, 980–8574, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Shiro Imagama,

  Affiliations Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumaicho, Showa Ward, Nagoya, Aichi, 466–0065, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Shunsuke Fujibayashi,

  Affiliations Department of Orthopedic Surgery, Graduate School of Medicine, Kyoto University, 54 Kawaharacho, Shogoin, Sakyo Ward, Kyoto, Kyoto, 606–8507, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Masashi Yamazaki,

  Affiliations Department of Orthopedic Surgery, Faculty of Medicine, University of Tsukuba, 2-1-1 Amakubo, Tsukuba, Ibaraki, 305–8576, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Morio Matsumoto,

  Affiliations Department of Orthopedic Surgery, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku Ward, Tokyo, 160–8582, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Masaya Nakamura,

  Affiliations Department of Orthopedic Surgery, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku Ward, Tokyo, 160–8582, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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• Atsushi Okawa,

  Affiliations Department of Orthopedic Surgery, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo Ward, Tokyo, 113–8519, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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•  [ ... ],
• Yoshiharu Kawaguchi

  Affiliations Department of Orthopedic Surgery, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama, Toyama, 930–0194, Japan, Working group of the CT study, Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL), Tokyo, Japan

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