Dural ectasia with dural diverticula in ankylosing spondylitis

Case contributed by Dr Ayaz Hidayatov


50 years old male with a 20 year history of ankylosing spondyilitis presented with walking difficulty and severe muscle atrophy in the bilateral lower limbs.

Patient Data

Age: 50-60
Gender: Male

MR demonstrates a typical appearance of the bamboo spine, on coronal STIR and T1 weighted images facet joints and both sacroiliac joints were ankylosed.

Dural sac shows widening (dural ectasia) with multiple dorsal dural diverticula causing an erosion of the posterior vertebral elements.

Conus medullaris is tethered at the level of the L1 to the dorsal aspects of the spinal canal and there is adhesion of the cauda equina nerve roots to the posterior wall of the dural sac.

Case Discussion

Dural ectasia with multiple dural diverticula is a very rare manifestation in patients with chronic ankylosing spondylitis. The exact etiology of dural ectasia and dural diverticula formation in patients with chronic ankylosing spondylitis is not clearly understood. 

PlayAdd to Share

Case information

rID: 55919
Published: 30th Sep 2017
Last edited: 16th Jul 2018
Inclusion in quiz mode: Included

Updating… Please wait.

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.