title: Operative observations and results of surgery after failure of chemonucleolysis.
mesh_terms: D006801:Humans; D007403:Intervertebral Disc / Q000187:drug effects; D007405:Intervertebral Disc Displacement / Q000188:drug therapy / Q000601:surgery; D012008:Recurrence; D012585:Sciatica / Q000188:drug therapy / Q000601:surgery*