title: An observation of ruptured annulus fibrosus in lumbar discs.
abstract: To observe anatomical or pathological changes in lumbar intervertebral discs, discography and computed tomography-discography (CTD) were performed on fresh human cadavers. The results of discograms and CTD were compared with histological findings of cross sections of discs. Preoperative CTD of lumbar disc herniation was investigated based on these results. Ruptures of the annulus fibrosus were divided into two categories: circumferential rupture and radial rupture. In CTD images of fresh human cadavers, most images of rupture of the annulus fibrosus showed anterior to lateral circumferential rupture. As disc degeneration progressed, circumferential rupture tended to coexist with radial rupture in many cases. In CTD cases of lumbar disc herniation, most images of ruptures of the annulus fibrosus showed a posterior radial rupture, which was the route for herniated nucleus. The greater the degree of degeneration, the more the images tended to show radial ruptures coexisting with circumferential ruptures.
authors.affiliation: Department of Orthopedic Surgery, Social Insurance Chukyo Hospital, Nagoya, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Ito
authors.forename: Y
authors.initials: Y
authors.lastname: Yamada
authors.forename: S
authors.initials: S
authors.lastname: Tsuboi
authors.forename: Y
authors.initials: Y
authors.lastname: Yamada
authors.forename: T
authors.initials: T
authors.lastname: Muro
mesh_terms: D000328:Adult; D000368:Aged; D003287:Contrast Media; D005260:Female; D006801:Humans; D007403:Intervertebral Disc / Q000000981:diagnostic imaging / Q000473:pathology*; D007405:Intervertebral Disc Displacement / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D012422:Rupture, Spontaneous; D013122:Spinal Diseases / Q000150:complications; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media