What question did this study set out to answer?

The aim is to explore the rare occurrence of cauda equina syndrome linked with dural ectasia in a patient with ankylosing spondylitis.

February 19, 2026Asian Journal of Neurosurgery0 citationsOpen Access

Cauda Equina Syndrome Associated with Dural Ectasia in Ankylosing Spondylitis: Case Report

LJLi Jialuo WXWang Xiaoxing GHGuo Hua

Key Points

The aim is to explore the rare occurrence of cauda equina syndrome linked with dural ectasia in a patient with ankylosing spondylitis.
Clinical case report of a 53-year-old female with a history of ankylosing spondylitis
Imaging via CT and MRI to identify dural ectasia and spinal abnormalities
Surgical intervention involving laminoplasty and filum terminale resection
Post-surgery, improvements seen in constipation, urinary incontinence, and muscle strength
CT and MRI revealed unique features of dural ectasia and erosion of lumbar vertebrae
Identified nerve root adhesions and their relation to dural structures

Abstract

Abstract Cauda equina syndrome (CES) associated with dural ectasia is a rare manifestation in patients with ankylosing spondylitis (AS). We report a case of a 53-year-old female with a 10-year history of AS who developed CES in the past 1 year. The CT and MRI findings revealed the unique appearances of dural ectasia, multiple ventral dural diverticula, erosion of lumbar vertebral bodies, adhesion of the nerve roots of the cauda equine, and the conus medullaris to the wall of the dural sac. Due to progressive clinical deterioration, surgical decompression was performed via laminoplasty with filum terminale resection to release adhesions involving the conus medullaris and nerve root. Postoperatively, constipation, urinary incontinence, and muscle strength improved. The possible mechanisms of CES associated with chronic AS are discussed.

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