Asymptomatic enlargement of the sella turcica.

Forty-six patients with enlarged sella turcica and pneumographic evidence of an intrasellar mass were initially untreated. The courses were variable, and 50% did not require subsequent treatment. All patients with initial visual involvement developed progressive visual impairment. Of patients with clinical evidence of pituitary insufficiency, 66% developed visual field defects and required treatment. Only one patient, whose sole symptom was headache, was subsequently treated, and no asymptomatic patient developed subsequent symptoms and required treatment. Asymptomatic patients with an enlarged sella turcica should have an air study to exclude an "empty sella" syndrome or primary hypothyroidism.