Study of Glucose Tolerance Abnormalities Using Continuous Glucose Monitoring for the Identification of Early Loss of Pancreatic Islet Graft Function.

This study is using continuous glucose monitoring (CGM) — a small wearable sensor that tracks blood sugar around the clock — to detect early signs that a transplanted pancreatic islet (insulin-producing cells) is losing function in people who received a pancreatic islet transplant for insulin-dependent diabetes. **You may be eligible if...** - You are 18 years of age or older - You have insulin-dependent diabetes (Type 1 diabetes, or diabetes from chronic pancreatitis, cystic fibrosis, or a rare genetic form called MODY) - You have completed a full pancreatic islet transplant procedure - You have agreed to allow your data to be used for this research **You may NOT be eligible if...** - You refuse to wear a continuous glucose monitor - You had an islet autotransplant (where your own cells were transplanted, not a donor's) - You are unable to provide informed consent - You are under legal guardianship or judicial protection Talk to your doctor to see if this trial is right for you.