In extension the degenerative yellow ligaments ( in 34 cases ) often folded and encroached upon the spinal canal which usually formed pincers effect with anterior compression ( in 9 cases ) .

34例患者的退变 黄 韧带在后伸位时皱折凸入椎管，凸入 黄 韧带又可与脊髓前方致压物形成钳夹效应而严重压迫脊髓（9例）。

Results Among 42 cases there were 27 of lumbar disc diseases 2 of congenital bony narrowing of vertebral canal 2 of hyperosteogeny at rear edge of vertebra 5 of vertebral dislocation 3 of pachynsis of yellow ligaments . All the patients received operative treatments .

结果在42例患者中，椎间盘病变27例，先天性骨性椎管狭窄2例，椎体后缘增生骨刺2例，椎体滑脱5例， 黄 韧带肥厚3例，椎间盘突出术后及疤痕增生3例。