e Evaluation of Operative Therapy of the Lumbar Nerve Root Compressions A descriptive study of 100 patients underwent radical lumber disc and bone operations was carried out. The study was performed in Ondokuzmayis University Medical School, Division of Neuro¬surgery between 1978-1982. 100 consecutive patients with the diagnosis of lumbar nerve root compression syndrome had undergone operations. 79 of the patients were diagnosed as intervertebral disc protrusions and 21 of 100 patients were diagnosed as bony (facet) changes. The results of the study were documented pre and postope¬ratively and stated by the probability values (p). 77.2 % of the disc protrusions and 66.7 % of the bony changes had a good outcome following radical surgery.