Clinical Indications.- Diagnostic Examinations.- Surgical Method.- Norms of Hygiene and Rehabilitation for the Patient Submitted to Percutaneous Discectomy.- Criteria for an Evaluation of the Results of Percutaneous Discectomy.- Comments.- Taylor anxiety questionnaire.- Rockliff self-rating questionnaire for depression (SRQ-D).- Crown and Crisp (MHQ) self-rating questionnaire for psychoneurotic patients.- References.