Endocrinology

A 29-year-old man presents to A and E with increasing thirst. He is admitted to hospital for routine investigations, some of which are shown below. https://www.niso.org/standards/z39-96/ns/oasis-exchange/table">

Haemoglobin

12 g/dL

White cell count

13 × 10⁹/L

Platelet count

450 × 10⁹/L

Sodium

149 mmol/L

Potassium

4.1 mmol/L

Urea

9 mmol/L

Creatinine

126 mcmol/L

C-reactive protein

54 mg/L

2-hour plasma glucose

11.6 mmol/L

Fasting plasma glucose

7.2 mmol/L

Anti-GAD antibodies

negative