ossification of the posterior longitudinal ligament
Also written as: OPLL — Ossification of the Posterior Longitudinal Ligament
Pathological condition where the posterior longitudinal ligament calcifies and becomes bone-like.
Full Definition
A progressive disease characterized by heterotopic ossification and calcification of the posterior longitudinal ligament, most commonly affecting the cervical spine. OPLL is more prevalent in Asian populations and can cause severe spinal cord compression leading to myelopathy. The ossified ligament forms a ridge along the posterior aspect of the vertebral bodies, narrowing the spinal canal. Treatment typically requires surgical decompression, with approach selection (anterior vs. posterior) depending on the extent and morphology of ossification.
Usage
Usage note: Commonly abbreviated as OPLL after first use. Specify spinal levels and morphological type when relevant.
In Context
- "CT myelography revealed extensive OPLL from C3 to C6 causing severe canal compromise." — imaging report
- "The patient's myelopathy was secondary to ossification of the posterior longitudinal ligament." — diagnostic assessment