Compression of the dural sac by anomalous lumbar articular processes as demonstrated by radiculosaccography.
D000368:Aged; D002420:Cauda Equina; D004388:Dura Mater / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging; D008297:Male; D008722:Methods; D008875:Middle Aged; D011859:Radiography; D013117:Spinal Cord Compression / Q000000981:diagnostic imaging / Q000209:etiology*; D013166:Spondylitis / Q000000981:diagnostic imaging*