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Changes in retro-odontoid mass after upper cervical spine surgery

 Jae-Won Shin  ;  Kyung-Soo Suk  ;  Hak-Sun Kim  ;  Jae-Ho Yang  ;  Hwan-Mo Lee  ;  Sung-Hwan Moon  ;  Byung-Ho Lee  ;  Jin-Oh Park  ;  Sang-Jun Park  ;  Sub-Ri Park  ;  Sun-Kyu Kim  ;  Jane F Garcia 
 SCIENTIFIC REPORTS, Vol.12(1) : 20035, 2022-11 
Journal Title
Issue Date
Atlanto-Axial Joint* ; Cervical Vertebrae / diagnostic imaging ; Cervical Vertebrae / pathology ; Cervical Vertebrae / surgery ; Humans ; Odontoid Process* ; Pain / pathology ; Retrospective Studies
A non-neoplastic mass posterior to the dens is termed a retro-odontoid mass (R-OM). This retrospective study evaluated radiographic and clinical outcomes and R-OM changes after upper cervical spine surgery. This study included 69 patients who underwent upper cervical spine surgery, including atlantoaxial fusion, occipitocervical fusion, or decompression. All patients underwent preoperative magnetic resonance imaging (MRI). Six-month follow-up MRI examinations were performed in 30 patients who had preoperative R-OMs. Radiographic outcomes of the anterior and posterior atlantodental intervals were measured using X-rays and computed tomography. The R-OM and space available for the cord (SAC) were measured using MRI. Clinical outcomes were evaluated using neck and arm pain visual analog scales, the Japanese Orthopedic Association score, the neck disability index, and the patient-reported subjective improvement rate. The anterior atlantodental interval decreased, while the posterior atlantodental interval and SAC increased postoperatively. Among the clinical outcomes, the neck and arm pain and the neck disability index decreased postoperatively, while the Japanese Orthopedic Association score increased. All clinical and radiographic outcomes improved postoperatively. The R-OM either decreased in size or disappeared after fusion surgery in all cases, except in one patient who underwent decompression surgery. In conclusion, stabilization through fusion surgery is essential for treating R-OM.
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1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Hak Sun(김학선) ORCID logo https://orcid.org/0000-0002-8330-4688
Moon, Seong Hwan(문성환)
Park, Sang-Jun(박상준)
Park, Sub-Ri(박섭리)
Park, Jin Oh(박진오)
Suk, Kyung Soo(석경수) ORCID logo https://orcid.org/0000-0003-0633-2658
Yang, Jae Ho(양재호) ORCID logo https://orcid.org/0000-0001-7421-2805
Lee, Byung Ho(이병호) ORCID logo https://orcid.org/0000-0001-7235-4981
Lee, Hwan Mo(이환모) ORCID logo https://orcid.org/0000-0002-5405-3832
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