Case report: Primary empty Sella causing secondary adrenal insufficiency and severe yet asymptomatic hyponatremia.

A 61-year-old man presented with incidental hyponatraemia to 118 mmol/L, to which he was asymptomatic. Diagnostic workup revealed a partially empty sella turcica on magnetic resonance imaging. He had associated secondary adrenal insufficiency but other hormonal axes were relatively unaffected.