Demography;17 variables Intraperative Period;16 variables Postoperative Period;20 variables Missing data codes: NA; INCNUM;inclusion number Demography; Groups;Postero-lateral thoracotomy or Axillary thoracotomy Age;"<65 years; ?65 years" Sex;"men=0; women=1" BMI;"Underweight; Normal; Overweight; Obese" ASA;American Society of Anesthesiologists class 1, 2 or 3 Cancer;"no=0; yes=1" Smoking;"smoker / ex smoker; non smoker; NA" Anxiety;"no=0; yes=1" Peroperative pain;"No pain; Painful" Pain on inclusion;Numerical Rating Scale which ranges from no pain = 0 to the worst possible pain = 10 Mean pain during the previous week;Numerical Rating Scale which ranges from no pain = 0 to the worst possible pain = 10 Thoracic pain;"yes; no" Neuropathic pain;"yes; no" Analgesic - at least one;"yes; no" Analgesic - Step 1;"yes; no" Analgesic - Step 2;"yes; no" Analgesic - Step 3;"yes; no" Intraperative Period; Duration of anesthesia;"< 180 minutes; ? 180 minutes; NA" Duration of surgery;"< 110 minutes; ? 110 minutes; NA" Lobectomy;"yes; no" Wedge;"yes; no" Pneumonectomy;"yes; no" Other procedure;"yes; no" Side of surgery;"right; left" Surgical retractors;"yes; no" Rib fracture;"yes; no" Number of pleural drains;"One chest tube; Two chest tubes" Serratus preservation;"yes; no" Latissimus dorsi preservation;"yes; no" Transcostal suture;"yes; no" Extrapleural detachment;"yes; no" Scar length;cm Postoperative Period; Trajectory;"1; 2; 3; 4" Type of postoperative analgesia;"Thoracic epidural analgesia; Paravertebral block; No locoregional analgesia" Chest tube in place at day 6 +/1 ;"yes; no" Pain score at rest;Numerical Rating Scale which ranges from no pain = 0 to the worst possible pain = 10 Pain score on cough;Numerical Rating Scale which ranges from no pain = 0 to the worst possible pain = 10 Pain score during mobilization of the ipsilateral shoulder;Numerical Rating Scale which ranges from no pain = 0 to the worst possible pain = 10 Neuropathic pain score;0 to 10 Neuropathic pain;"yes; no" Hypoesthesia: Height on the breast line;centimeters Hypoesthesia: Height on the axillary line;centimeters "Hypoesthesia: Height on the line ""tip of the scapula""";centimeters Satisfaction score;0 to 10 Postoperative complications, Grade;"No; I; II; IIIa; IIIb; Iva; Ivb; V " Postoperative hopital stay;days Pain score J0;Numerical Rating Scale which ranges from no pain = 0 to the worst possible pain = 10 Pain score J1;Numerical Rating Scale which ranges from no pain = 0 to the worst possible pain = 11 Pain score J2;Numerical Rating Scale which ranges from no pain = 0 to the worst possible pain = 12 Pain score J3;Numerical Rating Scale which ranges from no pain = 0 to the worst possible pain = 13 Pain score J4;Numerical Rating Scale which ranges from no pain = 0 to the worst possible pain = 14 Pain score J5;Numerical Rating Scale which ranges from no pain = 0 to the worst possible pain = 15