Prevalence and symptom of ossification of posterior longitudinal ligaments in the Japanese general population (original) (raw)
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Journal of Clinical Medicine, 2020
This study aimed to clarify whether ossification predisposition influences clinical symptoms including pain, restriction of activities of daily living, and quality of life in patients with cervical ossification of the posterior longitudinal ligament (OPLL). Cervical ossification predisposition potentially causes neurologic dysfunction, but the relationship between clinical symptoms and radiologic severity of OPLL has not yet been investigated. Data were prospectively collected from 16 institutions across Japan. We enrolled 239 patients with cervical OPLL. The primary outcomes were patient-reported outcomes, including visual analog scale (VAS) pain scores and other questionnaires. Whole-spine computed tomography images were obtained, and correlations were investigated between clinical symptoms and radiologic findings, including the distribution of OPLL, the sum of the levels where OPLL was present (OP-index), and the canal narrowing ratio (CNR) grade. The cervical OP-index was Grade ...
2021
Ossification of the posterior longitudinal ligament (OPLL) is a progressive disease. The bridging of ossified lesions to the vertebral body gradually increases, thereby decreasing the mobility of the cervical spine; thus, cervical spine function may decrease over time. However, cervical spine function in patients with cervical OPLL has not been evaluated in large prospective studies. Therefore, we conducted a prospective multicenter study to clarify whether ossification spread can influence cervical spine function and quality of life (QOL) in patients with cervical OPLL. In total, 238 patients (162 men, 76 women; mean age, 63.9 years) were enrolled from 16 institutions. Each patient underwent whole spine computed tomography and was evaluated cervical spine function and QOL using the Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ). In the multivariate regression analysis, a higher neck VAS score and a larger number of bridge formations of OPLL ...
World neurosurgery, 2018
To evaluate prevalence, incidence, morbidity, and mortality rates of cervical ossification of posterior longitudinal ligament (OPLL) using data from a 12-year national cohort of 1,025,340 Korean people. A nested case-control cohort study was performed from 2002 to 2013 using the insurance claims database provided by the National Health Insurance Service. We examined prevalence and incidence of cervical OPLL. Age- and sex-matched control subjects were randomly extracted, with 10 times the number of OPLL cases. Differences in sex, comorbidity, and relative survival rate compared with control subjects were assessed. Cumulative prevalence was 20,960 per 1,025,340 people for 12 years. Annual incidence was approximately 199-371 per 1 million people. Overall crude mortality rate was 7.64%. Relative survival rate of OPLL cases was not significantly different from control cases. Diabetes, hypertension, cardiovascular disease, and cerebrovascular disease, except renal disease, correlated sign...
Journal of Clinical Medicine
Background: The purpose of this study was to clarify the clinical features of ossification of the posterior longitudinal ligament (OPLL) and extreme ossification at multiple sites. Methods: This prospective study involved patients with a diagnosis of cervical OPLL at 16 institutions in Japan. Patient-reported outcome measures, including responses on the Japanese Orthopaedic Association (JOA) Cervical Myelopathy Evaluation Questionnaire (JOA-CMEQ), JOA Back Pain Evaluation Questionnaire (JOA-BPEQ), and visual analog scale pain score, were collected to investigate clinical status. In each patient, the sum of the levels at which OPLL was located (OP index) was evaluated on whole-spine computed tomography, along with ossification of other spinal ligaments including the anterior longitudinal ligament (OALL), ligament flavum (OLF), supra- and intraspinous ligaments (SSL), and diffuse idiopathic skeletal hyperostosis (DISH). The distribution of OP index values in the study population was i...
Ossification of the posterior longitudinal ligament in the cervical spine
O ssificatiOn of the posterior longitudinal ligament is a condition of abnormal calcification of the posterior longitudinal ligament. The most common location is at the cervical spine region. The spinal cord can be compressed by this lesion, which can cause neurological deficits. The treatment of choice for patients with symptomatic OPLL is surgery to relieve spinal cord compression. However, there are many unresolved controversies concerning OPLL: the exact pathogenesis and natural history of OPLL are still unclear, there is no standard treatment for patients with asymptomatic OPLL, and there is disagreement about the best surgical approach for OPLL surgery. In this study, we review the current literature including the incidence, pathology, pathogenesis, natural history, clinical presentation, classification, radiological evaluation, and management of OPLL. Methods The PubMed databases were searched for publications from January 2000 through August 2010 using the MeSH terms "OPLL" and "ossification of posterior longitudinal ligament." The search was limited to articles in the English language. Related reference sections of recent articles were reviewed and pertinent articles identified. Full-texts manuscripts of all articles were obtained and reviewed. Radiographic images from the senior author's institution are also included. Results Incidence The incidence of OPLL was reported by Tsuyama et al. 126 The incidence is 2.4% in Asian populations and 0.16% in non-Asian populations, with the highest rates in Japan. OPLL is twice as common in men as in women, and symptomatic OPLL usually presents in the 5th to 6th decade of life. Most studies of OPLL are reported from Asian countries, but anecdotal reports of OPLL cases in European countries also exist in the literature. Maiuri et al. 72 reported on 8 Italian patients with cervical spine stenosis due to OPLL.
BMC musculoskeletal disorders, 2016
Supra/interspinous ligaments connect adjacent spinous processes and act as a stabilizer of the spine. As with other spinal ligaments, it can become ossified. However, few report have discussed ossification supra/interspinous ligaments (OSIL), so its epidemiology remains unknown. We therefore aimed to investigate the prevalence and distribution of OSIL in symptomatic patients with cervical ossification of the posterior longitudinal ligament (OPLL). The participants of our study were symptomatic patients with cervical OPLL who were diagnosed by standard radiographs of the cervical spine. The whole spine CT data as well as clinical parameters such as age and sex were obtained from 20 institutions belong to the Japanese Multicenter Research Organization for Ossification of the Spinal Ligament (JOSL). The prevalence and distribution of OSIL and the association between OSIL and clinical parameters were reviewed. The sum of the levels involved by OPLL (OP-index) and OSIL (OSI-index) as wel...
Medicine, 2018
To investigate factors associated with surgical outcomes of cervical ossification of the posterior longitudinal ligament (OPLL). This retrospective study included patients (662 males and 251 females; mean age 55.8 years) with symptomatic OPLL. All patients had been diagnosed with OPLL based on cervical magnetic resonance imaging and computed tomography scans. Demographic, surgical outcome was measured using visual analog scale (VAS) and Japanese Orthopedic Association (JOA) scale scores. The results of our study indicated radicular pain was more common in segmental and circumscribe OPLL subtypes (P < 0.05). An anterior approach was favored in patients with less than 3 involved vertebral levels (P < 0.05). All surgical methods showed good outcomes (P < 0.05). Continuous and mixed OPLL subtypes showed worse surgical outcome with higher VAS and JOA scores (P < 0.05). Laminoplasty and anterior cervical discectomy and fusion were significantly associated with a higher recover...
Spine, 2012
Study Design. Prospective, comparative clinical study. Objective. To compare the clinical outcome of anterior decompression and fusion with fl oating method and laminoplasty in the treatment of cervical myelopathy caused by ossifi cation of the posterior longitudinal ligament (OPLL). Summary of Background Data. There have been no reports that have accurately and prospectively compared surgical outcomes after anterior decompression and posterior decompression. Methods. For cervical myelopathy caused by OPLL, we performed anterior decompression and fusion with fl oating method (ADF) in
Cervical Ossification of the Posterior Longitudinal Ligament: Anterior or Posterior surgery
2014
Ossification of the posterior longitudinal ligament (OPLL) is a complex multifactorial disease process combining both metabolic and biomechanical factors, most commonly found in men, the elderly and Asian patients. There are many diseases. There are many diseases associated with OPLL, such as diffuse idiopathic skeletal hyperostosis, ankylosing spondylitis, and other spondyloarthropathies. Several factors have been reported to be associated with OPLL formation and progression, including genetic, hormonal, environmental, and lifestyle factors. However, the pathogenesis of OPLL is still unclear. Plain radiography, CT, and MR imaging are used to evaluate OPLL extension and the area of spinal cord compression. Management of OPLL continues to be controversial. Each surgical technique has some advantages and disadvantages, and the choice of operation should be made case by case, depending on the patient's condition, level of pathology, type of OPLL, and the surgeon's experience. I...
Asian Journal of Neurosurgery
Aims: The aim of the study was to retrospectively evaluate the neurological outcome in operated patients of ossified posterior longitudinal ligament (OPLL) of cervical and/or dorsal spine using modified Japanese orthopedic association (mJOA) score and find out the factors affecting the outcome. Settings and Design: The study design was a retrospective study. Materials and Methods: Forty operated patients of cervical and/or dorsal spine OPLL were included in the study. Neurological examination was conducted and analyzed using mJOA score pre- and postoperatively at 1, 6, and 12 months. Improvement in the mJOA score based on age, sex, type of OPLL, duration of symptoms, type of surgical procedure, and radiological parameters were calculated, analyzed, and compared with previous records of the patient. Results: Significant improvement in mJOA scores with mean preoperative being 12.27 ± 1.95 with 1-year postoperative 13.85 ± 2.02 (P < 0.0001) noted. There is a significant difference i...