In cases of imaging suspicious for Adrenocortical Carcinoma (ACC) or signs of virilization/feminization, check DHEAS, androstenedione, testosterone, and 17-OH progesterone.
Cortisol ≤ 1.8 µg/dL (50 nmol/L) excludes autonomous cortisol secretion. Cortisol 1.9 - 5.0 µg/dL is "possible autonomous secretion." Cortisol > 5.0 µg/dL confirms autonomous cortisol secretion (ACS).
Management of adrenal incidentalomas: European Society of Endocrinology Clinical Practice Guideline
Select the necessary tests to build the biochemical workup checklist for an adrenal incidentaloma.