Transient severe non‐proliferative retinopathy in an adolescent with type 1 diabetes and chronic myeloid leukemia

The onset of diabetic retinopathy correlates with the long‐term quality of glycemic control. A 17‐yr‐old adolescent with type 1 diabetes presented unexpectedly with acute non‐proliferative retinopathy despite good glycemic control. Two months later chronic myeloid leukemia ( CML ) was diagnosed. Chemotherapy was initiated and within a few weeks the patient was in full remission concerning leukemia. Retinopathy completely resolved within 8 months. The patient was in good metabolic control throughout the course. To our knowledge, this is the first report of CML ‐triggered retinopathy in a well‐controlled diabetic adolescent. In case of unexpected retinopathy in patients with type 1 diabetes, other potential causes of retinopathy should be considered.