S. & Mohr. G. Ugamentum fiawm cysts causing incapacitating lumbar spinal stenosis. Can. J. Neurol Sc!. 32. 237-242 (2005). 13. Park. J. B.. Lee. J. K.. Park. S. J. & Mew. K. D. Hypertrophy of ligamentum Reran in lumbar spiral stenosis associated with increased proteinase inhibitor concentration. ). Bon