Microbiota and the Lung Cancer

Inclusion Criteria: * non small cell lung carcinoma patient suitable for surgery, or chemotherapy followed by surgery * BMI \<29.9 kg/m² * not taking antibiotics, corticosteroids and/or immunosuppressants at least during two months before inclusion * not taking prebiotics, probiotics or symbiotics at least during two months before inclusion * signing the written consent before enrollment in the study * affiliation to the national health insurance (or system alike) according to the law from 9th August 2004 Exclusion Criteria: * cognitive difficulties * refusal of participation or inability to give a clear consent * digestive or pulmonary infection of a long duration during the two months preceding the study (with antibiotic treatment) * inflammatory digestive pathology * concurrent treatment with experimental medication, participation in another clinical therapeutic study within 30 days * presence of colostomy, total or partial gastrectomy * previous esophageal surgery * previous ORL (otho-rhino-laryngo) cancer treated by radiotherapy or surgery * patient enable to follow the requirements of the study * patient deprived of his rights by administrative or judicial decision