Neuropathic bladder in ankylosing spondylitis with spinal diverticula.

Cauda equina type of syndrome with neuropathic bladder is a rare but known complication of long-standing ankylosing spondylitis. From 1968 until now, diverticula from the subarachnoid space eroding into the bodies of the lumbosacral vertebrae have been reported in 46 cases of ankylosing spondylitis with cauda equina syndrome and neuropathic bladder. We report 3 cases of neuropathic bladder and ankylosing spondylitis with cauda equina symptoms. In 1 of the 3 patients, these rarely encountered spinal diverticula were demonstrated by computerized tomography (CT) scan. The etiology of these diverticula and their treatment are reviewed.