This prospective study will be conducted on first line metastatic lung cancer patients. Three phenotypic groups are identified on immunohistochemistry done at inclusion: on metastatic sites or lung tumor if local recurrence, usual treatment protocols are often guided by the following groups:~For group 1: SCLC (small cell lung cancer)~Carbo or cisplatin + etoposide chemotherapy associated to atezolizumab or durvalumab~For group 2: NSCLC (no small cell lung cancer) without oncogenic addiction:~Adenocarcinoma, NOS, sarcomatoïd carcinoma or large cell carcinoma with PDL1 expression level ≥ 50%: Carbo/cisplatin + pemetrexed + pembrolizumab or pembrolizumab alone.~In case of contra indication of pembrolizumab, treatment will be based on doublet of chemotherapy with platinum salt +/- bevacizumab - Adenocarcinoma, NOS, sarcomatoïde carcinoma or large cell carcinoma with PDL1 expression level < 50%: Carbo/cisplatin + pemetrexed + pembrolizumab.~In case of contra indication of pembrolizumab, treatment will be based on doublet of chemotherapy with platinum salt +/- bevacizumab~- Squamous cell carcinoma with PDL1 ≥ 50%: Carboplatin + paclitaxel + pembrolizumab or pembrolizumab alone.~In case of contra indication of pembrolizumab, treatment will be based on doublet of chemotherapy with platinum salt - Squamous cell carcinoma with PDL1 < 50%: Carboplatin + paclitaxel + pembrolizumab or pembrolizumab alone.~In case of contra indication of pembrolizumab, treatment will be based on doublet of chemotherapy with platinum salt~• For group 3: NSCLC NSCLC (no small cell lung cancerwith oncogenic addiction (KRAS G12c/BRAFV600E/NTRK/ROS1/ALK/EGFR/RET/NTRK/HER2):~For which TKI is indicated: TKI as long as possible~If TKI is not indicated: doublet of chemotherapy with platinum salt +/- pembrolizumab or pembrolizumab alone for PDL1 ≥ 50% or doublet of chemotherapy +/- bevacizumab~Further treatment lines are administered according to standard practice. Biological and histological assessments are performed on specific metastasis biopsy samples done at baseline and at each progression.~Physical exam, standard laboratory tests, imaging (CT (computerized tomography) scan, PET-CT (Positron emission tomography-computed tomography) and bone scan (for patients with bone metastasis) will be performed every 2 to 3 months according to patient group. Clinical, biological, pathological, epidemiological, socio-economic and multiomic data will be collected throughout the study duration. These massive data will be used to create new algorithms in order to help clinicians to predict treatment response
RATIONALE : Currently, the mechanisms associated with the response or resistance to treatment are poorly understood and are multifactorial. These mechanisms involve clinical and biological factors associated with the host and the tumor and possibly the patient's psycho-social environment.~PURPOSE : This trial will assess the use of a prospective database dedicated to patients with breast cancers that contains clinical data as well as epidemiological, psychological, emotional, social, imaging, biological and biopathological data. These data will allow a creation of new modelling algorithms in order to predict response and resistance to treatment.