What does arachnoiditis on an mri mean?

Arachnoiditis is a condition characterized by inflammation of the arachnoid membrane, which is the middle layer of the three membranes that surround the brain and spinal cord.

On an MRI, arachnoiditis may appear as areas of increased signal intensity on T2-weighted images, which can indicate the presence of inflammation or scarring. Additionally, thickening or enhancement of the arachnoid membrane may also be visible on MRI.

The appearance of arachnoiditis on MRI can vary depending on the stage and severity of the condition. In some cases, the inflammation may be limited to a small area, while in other cases, it may be more widespread. Furthermore, the presence of other conditions, such as scarring or the formation of adhesions, can also affect the MRI findings.