4th April 2024

A 23-year-old gentleman came into the outpatient clinic with increased thirst and polyuria

A 23-year-old gentleman came into the outpatient clinic with increased thirst and polyuria. He has a known family history of type 2 diabetes mellitus, hypertension and hypothyroidism. He had a recent blood test done, which showed random glucose 11.3 mmol/L, HbA1c 32 mmol/mol, TSH 4.1 mIU/L, Sodium 158 mmol/L, K 3.4 mmol/L, Urea 4.3 mmol/L, Creatinine 90 micromoles/L, Calcium 2.4 mmol/L, morning cortisol levels 500 nmol/L. Based on these results, which of the following investigations can be used to confirm the diagnosis in this patient?

Select the SINGLE most appropriate option from the list below. Select ONE option only.