Ossification of Posterior Longitudinal Ligament

**Definition:** A calcification of the posterior longitudinal ligament of the spinal column, usually at the level of the cervical spine. It is often associated with anterior ankylosing hyperostosis.

**Tree numbers:** - C05.116.900.480 - C23.550.751.500

**Synonyms:** - Posterior Longitudinal Ligament Calcification - Calcification of Posterior Longitudinal Ligament - Posterior Longitudinal Ligament Ossification