Study Using WST11 in Patients With Obstructing Endobronchial Non-Small Cell Lung Cancer

Inclusion Criteria: * Histologically proven lung cancer * Inoperable * Non-Small Cell Cancer * Partial or total bronchial obstruction responsible for functional signs * T1 to T4, N0-N3, M0-M1 * Patients with functional signs: hemoptysis, infection, cough and, above all, dyspnea * Contralateral metastases not representing a contraindication insofar as they do not represent a risk of impairment of respiratory function during treatment * The Karnofsky index should be greater than or equal to 40 * Patients should agree to and tolerate repeated bronchial endoscopy (a disadvantage of all endoscopic treatments) * Male or female patients aged over 18 years, female patients should not be pregnant (menopause or contraception) * Patients should have given their written consent to take part in the study Exclusion Criteria: * Tracheal lesions and lesions affecting the carina tracheae * Patients with painful bone metastases (not an absolute criterion since the extent of dyspnea is the decisive element) * Patients with brain metastases * Patients having undergone pneumonectomy * Patients undergoing chemotherapy or radiotherapy or having undergone chemotherapy less than 4 weeks before the procedure or radiotherapy less than 4 weeks before the procedure * Patients with risk of large vessel erosion or perforation resulting from lesion topography * In case of allergy to the photosensitizer * Leukopenia (WBC\<2000), Thrombocytopenia (\< 100 000), PT \> 1.5 normal, Fibrinogen \< 2g/l, a PTT \> 1.5 ULN (Upper Limit of Normal) * Renal insufficiency * Hepatic insufficiency * Patients having already received 70 Gy on the lesion * Existing tracheoesophageal or bronchoesophageal fistula * Emergency treatment of patients with severe acute respiratory distress caused by an obstructing endobronchial lesion