Microvascular complications of diabetes such as eye, kidney and nerve disease are common in individuals with type 1 and type 2 diabetes, and are a source of significant morbidity and mortality. Microvascular diabetes complications have been anecdotally reported in cystic fibrosis related diabetes (CFRD), but their prevalence is unknown. 40% of adult CF patients have CFRD, which shares features of both type 1 and type 2 diabetes but is a distinct clinical entity (1). Many clinicians are reluctant to add the burden of aggressive diabetes management to the already complex medical regimen of these patients. It is sometimes stated that they will not live long enough to develop complications of diabetes. However, longevity in CF has dramatically increased, and many patients now live into their thirties, forties, and fifties. As they live longer, it becomes increasingly likely that at least some will develop diabetes complications. A better understanding of this negative outcome would help resolve the question of whether aggressive screening and management of diabetes is necessary in CF.