In any patient with an ___ , essential laboratory studies to evaluate possible hormone function include serum electrolytes, dexamethasone suppression test, and 24-hour urine catecholamine, metanephrine, vanillylmandelic acid, and 17-ketosteroids measurement.
a) Pituitary adenoma
b) Ovarian cyst
c) Adrenal mass
d) Thyroid nodule