Validated risk markers for longitudinal and thickness progression of OPLL.
Scan Integrity Audit
Determine the risk of ossification progression based on age segment, morphological type, and residual canal diameter.
Guidelines & Evidence
Clinical Details
Section 1
When to Use
When to Use
Counseling patients incidentally diagnosed with Ossification of the Posterior Longitudinal Ligament (OPLL).
Deciding between conservative observation and prophylactic surgical decompression before myelopathy strikes.
Section 2
Literature
Development
OPLL was first described in Japan and is highly prevalent in East Asian populations. Research from the Japanese Investigation Committee on OPLL established that progression is not uniform. "Continuous" and "Mixed" types grow significantly faster than "Segmental" types, and younger age at diagnosis guarantees more time for the ossification to bridge and thicken.
Section 3
Pearls/Pitfalls
The Dural Tear Risk
OPLL does not just push on the dura—it often ossifies directly INTO the dura mater via dural ossification. Anterior approaches (ACDF, corpectomy) on thick OPLL carry a massive risk of catastrophic CSF leak compared to posterior approaches (laminoplasty).
Section 4
Evidence Appraisal
Primary Reference
Ossification of the posterior longitudinal ligament of the cervical spine: etiology and natural history
