For some years, the investigators observe an increase of the arisen of diabetes in cystic fibrosis patients However, this diabetes may be reversible. The investigators speak about " Cystic fibrosis related diabetes.". The objective of this project, is to know better what facilitates the appearance and the reversibility of the diabetes, such as the genetic mutations, the respiratory state and the lung infections. Theses knowledges should allow to adapt the screening of diabetes, and its treatment, for the patients affected by cystic fibrosis.

Inclusion Criteria:

• Cystic fibrosis patients with at least one visit in Cystic fibrosis Center in Rhône-Alpes (France) during the second half-year 2008
• Patients with disorders or not of the glucose metabolism
• Patient with pancreatic insufficiency

Exclusion Criteria:

• Patient with hypoglycemia treatment : insulin or oral antidiabetic
• Patient with an age < 10 years
• Patient with lung transplant