Comment on

• Surgical management of idiopathic spinal cord herniation: a review of nine cases treated by the enlargement of the dural defect.

  Watanabe M, Chiba K, Matsumoto M, Maruiwa H, Fujimura Y, Toyama Y. Watanabe M, et al. J Neurosurg. 2001 Oct;95(2 Suppl):169-72. doi: 10.3171/spi.2001.95.2.0169. J Neurosurg. 2001. PMID: 11599832