Pituitary microadenoma with hypopituitarism presenting as hyponatremia

The incidence of pituitary adenoma has been increasing these days. Majority of the cases are incidental findings on imaging; and these patients may be asymptomatic without any laboratory abnormalities. However, a non-functional sellar mass can initially present with hypopituitarism. The patient being described is an elderly female who presented with severe hyponatraemia. She has history of recurrent admissions for hyponatraemia in the past. Her biochemical evaluation revealed hypopituitarism and magnetic resonance imaging of brain showed pituitary microadenoma. Hyponatraemia as a presenting feature of hypopituitarism due to pituitary microadenoma is an uncommon scenario.

Automated summary

The incidence of pituitary adenoma is on the rise, with most cases being incidental findings on imaging but presenting symptoms such as severe hyponatremia in some patients. The case described in the text highlights an elderly female patient who developed hypopituitarism and severe hyponatremia due to a pituitary microadenoma, which is a rare scenario.