Dehydroepiandrosterone Sulfate (DHEAS)

Function

DHEAS is an androgenic steroid hormone produced almost exclusively by the adrenal cortex. It serves as a precursor for more potent androgens like testosterone and estrogens like estradiol. Unlike DHEA, the sulfated form (DHEAS) has a long half-life and stable serum concentrations, making it an excellent marker for adrenal androgen production.

Why it is Ordered

This test is primarily used to evaluate adrenal gland function and to distinguish between adrenal-origin and ovarian-origin androgen excess. It is commonly ordered for women exhibiting signs of virilization, hirsutism (excess body hair), or irregular menses, and for children with premature pubarche (early pubic hair).

Associated Conditions

• Polycystic Ovary Syndrome (PCOS): While primarily ovarian, many women with PCOS have mildly elevated DHEAS.
• Adrenal Tumors: Very high levels are often seen in adrenal carcinomas or adenomas.
• Congenital Adrenal Hyperplasia (CAH): Genetic enzyme deficiencies leading to overproduction of androgens.
• Adrenal Insufficiency: Low levels may indicate Addison’s disease or secondary pituitary failure.

Clinical Utility

DHEAS levels peak in the early 20s and naturally decline with age. Therefore, interpretation must always be done using age-matched reference ranges. It is a critical tool in the workup of hyperandrogenism and infertility.