Question

A 35-year-old man presents with thirst and polyuria. Serum sodium is 148 mmol/L, serum osmolality high, urine osmolality low and not rising with water deprivation but increases after desmopressin. What is the most likely diagnosis?

Accepted Answer

Central diabetes insipidus

Answer

Primary polydipsia

Answer

Nephrogenic diabetes insipidus

Answer

Uncontrolled diabetes mellitus

Answer

Psychogenic polydipsia

Practice question

A 35-year-old man presents with thirst and polyuria. Serum sodium is 148 mmol/L, serum osmolality high, urine osmolality low and not rising with water deprivation but increases after desmopressin. What is the most likely diagnosis?