This is a medical record data collection study. The goal of this non-interventional and retrospective study is to describe the characteristics of the population currently being monitored for bronchial dilatation who have been treated with long-term NIV. This is a study based on data from medical records.

The assessment criteria will be :

• Epidemiological characteristics of the population with bronchial dilatation on long-term NIV
• Reasons for initiation of NIV
• NIV adjustment methods

Non-invasive ventilation is a treatment sometimes used for severe severe bronchial dilatation, but to date there are no studies its efficacy.

The expected results in this context are :

• a description of the characteristics of patients with severe bronchial on non-invasive ventilation (NIV)
• a better understanding, during NIV management, of the settings used, the tolerance and effectiveness of NIV in reducing exacerbations, hospital admissions and patient mortality.
• move towards better patient management

Data will be extracted from patient medical records and the PMSI.

Inclusion Criteria:

• Patients over 18 years
• Predominant diagnosis of bronchiectatic disease, excluding cystic fibrosis, confirmed by computed tomography
• Introduction of long-term NIV at a given point in the patient's care

Exclusion Criteria:

• Patient's opposition to participating in this study
• Cystic fibrosis
• Predominant diagnosis of COPD or asthma, traction bronchiectasis, bronchiectasis resulting from focal endobronchial lesion, sarcoidosis or active allergic bronchopulmonary aspergillosis.

Population currently being treated for bronchial dilatation treated with long-term NIV