ABSTRACT
A 48-year-old woman was reviewed by her general practitioner after developing symptoms of weight gain and fatigue. She had been feeling generally unwell for several weeks. Her past medical history included type 1 diabetes mellitus and hypothyroidism. Her regular medications were: insulin (via a continuous pump), ferrous sulfate 200 mg OD and levothyroxine 75 μg OD. She worked as a diving instructor, did not smoke and did not drink alcohol.
