My mother just came back from visiting some distant relatives overseas. She had already been aware that one of these people had a brother (not genetically related to us) who was diagnosed with diabetes as a child, but on this visit, she learned that all three of his children also developed diabetes during childhood. None of the three of them have had kids. The three of them are my mother's age: they're in their fifties, which means they were all diagnosed 40+ years ago. None of them have ever had hypoglycemia. None of them has complications. All are on insulin (except the dad, who is dead). I'm wondering if I should try to get a message to them about MODY in case they have it and in case they would be able to go off insulin if they do have it. They were diagnosed at ages 8, 10, and 12, and their dad was 8 when he was diagnosed. All of the information about them comes from the dad's sister. What would you do? Do you think it's really likely they have type 1?