Small synovial bursae associated with the capsules of the lumbar facet (zygapophyseal) joints, particularly L4-L5 and L5-S1. These bursae may distend with synovial fluid and protrude medially into the lateral recess, causing nerve root compression indistinguishable from a disc herniation.
Lumbar facet cysts (synovial or ganglion) arising from zygapophyseal bursae are a recognised cause of radiculopathy in older patients with facet arthropathy. MRI demonstrates a cystic structure adjacent to the facet joint compressing the thecal sac or nerve root. Fluoroscopic rupture via intra-articular steroid injection resolves up to 50% of cases; surgical decompression is definitive.
Distension of the zygapophyseal bursa into the spinal canal producing radiculopathy clinically identical to disc herniation, diagnosed on MRI and treated by injection or surgical excision.
This website uses cookies to enhance your experience. Some are essential for site functionality, while others help us analyze and improve your usage experience. Please review your options and make your choice.
If you are under 16 years old, please ensure that you have received consent from your parent or guardian for any non-essential cookies.
Your privacy is important to us. You can adjust your cookie settings at any time. For more information about how we use data, please read our privacy policy. You may change your preferences at any time by clicking on the settings button below.
Note that if you choose to disable some types of cookies, it may impact your experience of the site and the services we are able to offer.
Some required resources have been blocked, which can affect third-party services and may cause the site to not function properly.
This website uses cookies to enhance your browsing experience and ensure the site functions properly. By continuing to use this site, you acknowledge and accept our use of cookies.
