A prospective multicenter evaluation for prevalence and distribution of ossified lesion in whole spine of patients with cervical ossification of posterior longitudinal ligament

A prospective multicenter evaluation for prevalence and distribution of ossified lesion in whole spine of patients with cervical ossification of posterior longitudinal ligament - A prospective multicenter study for ossified lesion in whole spine of OPLL patients

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000024471

Enrollment

400

Registered

2016-11-01

Start date

2015-09-30

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Cervical ossification of posterior longitudinal ligament

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients in whom ossification of posterior longitudinal ligament is confirmed on plain X-ray.

Exclusion criteria

Exclusion criteria: Patients will not get consent

Design outcomes

Primary

Measure	Time frame
CT images of the whole spine will be obtained for each patient. Distribution of OPLL, the sum of the levels in which OPLL exists (ossification index of OPLL: OP-index), and the sum of cervical intervertebral segments where ossification of the anterior longitudinal ligament exists (cervical OA-index) will be investigated.	—

Countries

Japan

Contacts

Public ContactTakashi Hirai

Tokyo Medical and Dental University Department of Orthopedic Surgery

hirai.orth@tmd.ac.jp03-5803-5279

Outcome results