Type 2 diabetes mellitus and thyrotoxicosis presenting concurrently

The symptoms of thyrotoxicosis and diabetes mellitus can be quite similar, and in patients presenting with diabetes, thyrotoxicosis could be missed unless specifically tested for. There are few reports of the two conditions presenting at the same time. We report on two such cases. In a patient who is diagnosed as having both conditions concurrently, an oral glucose tolerance test should be repeated after successful treatment of thyrotoxicosis before a diagnosis of diabetes mellitus is made.