Bronchial Trans-epithelial Transport in Patients With Idiopathic Multiple Dilations of the Bronchi

Inclusion Criteria: Common criteria for all patients * Age between 2 and 20 years. * Patient weighing more than 12kg * Patients with a scheduled bronchoscopy under clinical monitoring (assessment of bronchial involvement, local samples for bacteriological and histological examination) * Signature of consent by the patient or by the / the holder (s) of parental authority and the investigator * Patient affiliated to a social security scheme or entitled * Patient with contraception (for woman of childbearing age) Specific criteria for idiopathic bronchiectasis patients Patient with idiopathic bronchiectasis in at least two lobes, diagnosis made after extensive screening of known acquired or congenital causes Specific criteria for "control" patients without abnormal ion transport * Patient Not having bronchiectasis s or any supposed alteration in transepithelial ion transport * Patients with fiberoptic bronchoscopy performed for one of the following indications: * Pulmonary malformations * Laryngeal, tracheal, bronchomalacia * Airway compression * Interstitial pathology * Suspicion of foreign body * Suspected tuberculosis Specific criteria for patients with a typical form of cystic f ibrosis (CF) Patient carrying 2 causing mutations in the CFTR gene (according to CFTR2 database; http://www.cftr2.org/mutations\_history.php) and sweat test\> 60 milliequivalent per liter (mEq/L). Exclusion Criteria: Common criteria for all patients * Smoking passive or active * Not essential …