The purpose of this study is to reveal the effectiveness and safety of integrative Korean medicine for Ossification of Posterior Longitudinal Ligament(OPLL) by observation inpatients treated with integrative Korean medicine.

This study is a prospective observational study. The subjects for study are patients diagnosed with OPLL and who have been admitted to four Jaseng Hospital of Korean medicine (Gangnam, Bucheon, Daejeon, and Haeundae) for 2016.04.01-2019.12.31.

Medical records of selected patients will be analyzed, and telephone surveys will be conducted for each patient. The survey questions are Numeric ratinc scale (NRS), Vernon-Mior Neck Disability Index (NDI), quality of life, and Patient Global Impression of Change (PGIC), etc.

Inclusion Criteria:

• Patients diagnosed with OPLL by C spine X-ray or MRI or CT
• Paithents who was admitted to Jaseng hospital of Korean medicien.
• Patients have agreed to participate the study.

Exclusion Criteria:

• Patient hospitalized under 3 days
• Patients who have been diagnosed with certain serious diseases that may cause disturbance to interpretation of conclusion (cardiovascular problems, kidney disease, diabetic neuropathy, dementia, epilepsy, and so on)
• Patients who have been diagnosed with certain serious diseases that may cause back pain or neck pain (tumor metastases to the spine, fibromyalgia, rheumatoid arthritis, gout, and so on)
• Patients had cervical spinal surgery within 3 months
• Patients diagnosed with C spine fracture by C spine X-ray or MRI or CT
• Patients deemed unable to participate in the clinical research by other researchers
• Patients haven't agreed to participate the study.

The subjects for study are patients diagnosed with OPLL and who have been admitted to four Jaseng Hospital of Korean medicine (Gangnam, Bucheon, Daejeon, and Haeundae) for 2016.04.01-2019.12.31