Can you explain the evaluation and management of adrenal hyperandrogenism from an endocrinologist’s perspective?

Adrenal Hyperandrogenism: An Endocrinologist's Perspective

Adrenal hyperandrogenism requires a systematic diagnostic approach to localize androgen excess to the adrenal glands, followed by glucocorticoid suppression therapy for functional disorders or surgical resection for tumors, with the overarching goal of preventing long-term metabolic and cardiovascular complications that significantly impact morbidity and mortality. 1

Understanding the Pathophysiology

Adrenal hyperandrogenism represents excessive androgen production specifically from the adrenal cortex, distinct from the more common ovarian sources. The adrenal glands produce weak androgens—primarily DHEAS, androstenedione, and DHEA—from the zona reticularis 1. When you encounter a patient with hyperandrogenic symptoms, your primary task is determining whether the source is adrenal, ovarian, or combined.

Clinical Presentation: What to Look For

Cutaneous Manifestations

• Persistent acne beyond the late teens or 20s, especially when resistant to standard dermatologic treatment 1
• Hirsutism with terminal hair growth in androgen-dependent areas (upper lip, chin, chest, abdomen)
• Androgenic alopecia

Reproductive Dysfunction

• Oligomenorrhea or amenorrhea
• Anovulation and infertility
• In severe cases: virilization with clitoromegaly (red flag for tumor) 2, 3

Critical Metabolic Red Flags

The metabolic sequelae are what truly threaten long-term morbidity and mortality 1:

• Insulin resistance and impaired glucose tolerance progressing to type 2 diabetes
• Dyslipidemia: reduced HDL cholesterol and elevated triglycerides
• Hypertension
• Increased cardiovascular risk

These metabolic complications must be at the forefront of your therapeutic considerations, not just the cosmetic concerns. 1

Diagnostic Algorithm

Step 1: Initial Biochemical Evaluation

Measure these androgens to localize the source:

• DHEAS: The most specific marker for adrenal androgen production
• Total testosterone: Preferably by tandem mass spectrometry 2
• Androstenedione
• 17-hydroxyprogesterone (17-OHP): To screen for congenital adrenal hyperplasia 4

Interpretation thresholds 2, 3:

• Testosterone >5 nmol/L (>144 ng/dL): Suggests virilization and mandates urgent tumor evaluation
• However, 25.9% of androgen-producing adrenal tumors present below traditional thresholds, so don't rely solely on cut-offs 3
• Elevated DHEAS with normal or mildly elevated testosterone: Points toward adrenal source

Step 2: Dynamic Testing to Confirm Adrenal Origin

Dexamethasone suppression test 1:

• Administer 0.5 mg dexamethasone at bedtime
• Measure androgens in the morning
• Glucocorticoid-suppressible hyperandrogenism confirms functional adrenal source
• Paradoxical rise in androgens occurs in ~30% of adrenal tumors 3

ACTH stimulation test for suspected 21-hydroxylase deficiency 4:

• Baseline 17-OHP >300 nmol/L (>10,000 ng/dL): Likely classic CAH
• Post-ACTH 17-OHP >300 nmol/L: Confirms classic CAH
• 31-300 nmol/L post-ACTH: Suggests nonclassic CAH

Step 3: Metabolic Assessment

Screen for insulin resistance and cardiovascular risk 1:

• Fasting glucose and insulin: Glucose/insulin ratio <4.5 indicates insulin resistance
• Lipid panel: Look for low HDL and high triglycerides
• Blood pressure measurement

Step 4: Imaging

When to image 2, 5:

• Testosterone >5 nmol/L
• Rapidly progressive virilization
• DHEAS markedly elevated
• Failure to suppress with dexamethasone

Imaging modality:

• Adrenal CT or MRI to identify adenomas or carcinomas
• Note: 18% of benign androgen-producing tumors show alternative histologies (oncocytomas, ganglioneuromas) 3

Treatment Strategy

For Functional Adrenal Hyperandrogenism (Glucocorticoid-Suppressible)

Glucocorticoid therapy is the cornerstone 1:

Initial dosing (2-3 months):

• Prednisone 5-7.5 mg daily after supper, OR
• Dexamethasone 0.25-0.5 mg daily after supper

Maintenance (if androgens normalize):

• Reduce to prednisone 5 mg or dexamethasone 0.25 mg for 2-3 months
• Then halve the dose or discontinue
• Monitor androgens every 3-4 months for 1 year

Important caveats 1:

• Prednisone is preferred over dexamethasone due to lower risk of metabolic effects and bone resorption
• DHEAS typically remains suppressed indefinitely after treatment
• Testosterone levels more likely to recur than DHEAS
• Expect sustained improvement in acne, modest effect on hirsutism (slower growth, softer hair)
• Improved ovulatory function and fertility often occur

For Congenital Adrenal Hyperplasia

Hydrocortisone is the preferred glucocorticoid in growing patients 4:

• Short half-life minimizes growth suppression
• Avoid oral HC suspension and long-acting potent glucocorticoids chronically
• All classic CAH patients require fludrocortisone plus sodium chloride supplements in infancy

Critical balance: Undertreatment risks adrenal crisis and accelerated bone age; overtreatment causes iatrogenic Cushing's syndrome and growth suppression 4

For Adrenal Tumors

Surgical resection is the definitive treatment 5, 6, 3:

• Indicated for all suspected malignancies
• Even benign adenomas warrant surgery given the 2/3 prevalence of carcinomas among androgen-secreting tumors 6
• Postoperative androgen normalization confirms diagnosis

Adjunctive Pharmacologic Options

When surgery is not feasible or for combined ovarian-adrenal hyperandrogenism 1:

• Antiandrogens: Spironolactone, flutamide (not FDA-approved for this indication; contraindicated in pregnancy)
• Insulin-sensitizing agents: Metformin, thiazolidinediones (address metabolic complications)
• 5α-reductase inhibitors: Finasteride (reduces peripheral androgen effects)
• Oral contraceptives: Suppress ovarian contribution

Non-Pharmacologic Interventions

• Weight reduction: Critical for insulin resistance 1

Common Pitfalls to Avoid

1. Don't dismiss mild elevations: 25.9% of adrenal tumors present below traditional thresholds 3
2. Don't overlook metabolic screening: The cardiovascular and diabetic complications are what kill patients, not the hirsutism 1
3. Don't use long-acting glucocorticoids chronically in children: Growth suppression is irreversible 4
4. Don't assume suppression means benign: ~30% of tumors show paradoxical androgen rise with dexamethasone 3
5. Don't forget cortisol co-secretion: Present in 28% of androgen-producing adenomas 3

Early Intervention is Critical

Diagnose and treat in the perimenarchal or early postmenarchal period when possible 1. Early treatment prevents:

• Severe acne and hirsutism
• Dysfunctional bleeding
• Infertility
• Most importantly: metabolic and cardiovascular complications that develop over decades 1

The endocrinologist's unique value lies in recognizing hyperandrogenism as a systemic endocrine disorder with multi-organ consequences, not merely a cosmetic problem 1. Your treatment decisions should prioritize preventing type 2 diabetes, cardiovascular disease, and premature mortality—outcomes that profoundly impact quality of life and survival.