A 28-year-old lean female presents with: Unintentional weight loss Polyuria and polydipsia Fatigue for 3 months She has no family history of diabetes and BMI is 19 kg/m². Investigations: Fasting glucose: 198 mg/dL HbA1c: 9.2% C-peptide: Low-normal GAD antibodies: Negative She was initially diagnosed as Type 2 Diabetes and started on oral hypoglycemic agents, but glycemic control remains poor.
Over the next few weeks, she develops: Intermittent abdominal pain Mild ketosis (without frank DKA)