Ossification of the ligamentum flavum

3 things to know first

1. A spinal ligament has become bone-like. This differs from simple ligament thickening.
2. The level and amount of crowding matter. It is often discussed in the thoracic spine.
3. Neurological symptoms need attention. Walking and leg function are especially important.

What it is

The ligamentum flavum joins the rear parts of neighboring vertebrae. Ossification means bone-like tissue has formed within it. This can project into the spinal canal and, in some cases, compress the spinal cord or nerve structures.

Why it appears on your report

CT shows the ossified tissue clearly. MRI helps assess available space and any effect on the cord. The report may describe one or more levels, narrowing, compression, and cord signal.

How serious is it

Some cases are incidental; others cause myelopathy with progressive walking difficulty or weakness. The presence of ossification alone does not determine treatment, but neurological decline needs timely assessment.

When to seek care urgently

Seek urgent care for new or worsening leg weakness, frequent falls, walking difficulty, or bladder or bowel changes.

What usually happens next

1. Review CT and MRI together when available.
2. Compare neurological symptoms with the affected levels.
3. Discuss specialist evaluation if the cord is compressed or function is declining.

Further reading

• RadiologyInfo — Spine MRI
• RadiologyInfo — Myelography