Surgical Resection of Bilateral Adrenal Disorders for Cushing's Syndrome
STEP 1 — Gather Information
Confirm overt Cushing's syndrome with elevated 24‑h urinary free cortisol or late‑night salivary cortisol; measure plasma ACTH to distinguish ACTH‑independent (<5 pg/mL) from ACTH‑dependent sources; obtain adrenal protocol CT or MRI to assess size, number, and characteristics of adrenal lesions; consider adrenal venous sampling if lateralization is uncertain.
STEP 2 — Rule In / Rule Out
If plasma ACTH is suppressed (<5 pg/mL) indicating an ACTH‑independent (adrenal) source, proceed to evaluate bilateral disease; if ACTH is not suppressed, rule out a primary adrenal etiology and pursue pituitary or ectopic sources instead.
STEP 3 — Classify or Stratify
Classify bilateral adrenal pathology: bilateral macronodular adrenal hyperplasia (multiple nodules >1 cm on both sides), bilateral adenomas (distinct nodules), or bilateral carcinoma (irregular, invasive lesions); unilateral dominant lesion redirects to unilateral adrenalectomy.
STEP 4 — Decide
Recommend bilateral laparoscopic adrenalectomy as definitive treatment; for patients with prohibitive surgical risk or who decline surgery, consider medical therapy to block aberrant hormone receptors (e.g., mifepristone, ketoconazole) as a bridge or palliative option.
Clinical Guardrails / Mimics / Pitfalls
Do not perform unilateral adrenalectomy when bilateral disease is confirmed; avoid relying solely on medical therapy for bilateral adrenal carcinoma; ensure lifelong glucocorticoid and mineralocorticoid replacement postoperatively; monitor for Nelson syndrome if the patient has a history of Cushing’s disease; do not delay surgery in patients with life‑threatening hypercortisolism (e.g., severe infection, thrombosis, psychosis).
Concrete Clinical Example
A 48‑year‑old woman presents with weight gain, hypertension, and undetectable ACTH; CT shows 3.5 cm nodules in both adrenal glands; biochemical testing confirms ACTH‑independent Cushing’s syndrome; she undergoes bilateral laparoscopic adrenalectomy, postoperative cortisol is undetectable, and she is started on hydrocortisone 20 mg/day and fludrocortisone 0.1 mg/day.
Source: Treatment of Cushing’s Syndrome: An Endocrine Society Clinical Practice Guideline, Nieman et al., Endocrine Society, 2015, DOI:10.1210/jc.2015-1818