Chronic post-thoracotomy pain is the most common long-term complication that occurs after a thoracotomy with a reported incidence of up to 80%. Surgical approach as well as other factors (genetic, psychological) could have a major and independent role in the development of the post operative pain.The main objective of this study is to identify genetic and psychological profile (cognitive and emotional) of patients who develop chronic pain after lung surgery.

Inclusion Criteria:

• Undergoing lung resection surgery.
• 18 years and older (without superior limit);
• Affiliated to french "securité sociale"

Exclusion Criteria:

• Emergency procedure
• litigation or search for compensation;
• Previous intervention in the same region;
• Peripheral neurological pathology (polyneuropathy) or central (brain damage, multiple sclerosis …) that may interfere with the evaluation of the post-operative pain
• Participation in another biomedical research protocol if there is an incompatibility with the present protocol.
• mental disability
• vulnerable person within the meaning of French law,
• poor understanding of French.