Background: Insulin autoimune syndrome (IAS), also known as Hirata’s disease, is a rare cause of spontaneous hyperinsulinemic hypoglicemia characterised by the presence of autoantibodies directed against human insulin (IAA).
Case Report: A 48-year-old Caucasian female patient with IAS was studied in two different periods, for 7 days each, using a continuous monitoring system (CGM) under various treatment regimens, i.e diet modification and corticosteroids therapy.
Discussions: The use of CGM in autoimmune hypoglycemia is encouraged and must be taken into consideration in order to prevent episodes of hypoglicemia. Including of IAS and quantification of IAA in differential diagnosis in patients with hypoglicemia episodes and negative imaging results can prevent patients from going through unnecessary procedures.