A patient with severe postprandial hyperinsulinaemic hypoglycaemia (PPHH) for 4 years developed type 1 diabetes mellitus. She had no insulin or insulin receptor antibodies but was positive for islet cell and glutamic acid decarboxylase (GAD) antibodies. PPHH prior to the onset of type 1 diabetes mellitus has not been previously described and may be a prodrome of type 1 diabetes mellitus.
- DM, diabetes mellitus
- GAD, glutamic acid decarboxylase
- IAS, insulin autoimmune syndrome
- OGTT, oral glucose tolerance test
- PPHH, postprandial hyperinsulinaemic hypoglycaemia
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Competing interests: None.