2nd April 2024

A 25-year-old man came into the outpatient clinic due to increased thirst and polyuria

A 25-year-old man came into the outpatient clinic due to increased thirst and polyuria. He has no family history of diabetes mellitus. His HbA1C is 38 mmol/mol and plasma sodium is 159mmol/L. Urine osmolality is 398mOsmol/kg. Based on these results, what hormone is this gentleman likely to be deficient in?

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