Unilateral Resection by Experienced Adrenal Surgeon for Benign Unilateral Disease
STEP 1 — Gather Information
Collect confirmation of overt Cushing's syndrome (elevated UFC, loss of diurnal cortisol rhythm, or abnormal dexamethasone suppression test), adrenal imaging showing unilateral lesion, and biochemical/imaging evidence of benign unilateral etiology (suppressed ACTH, contralateral adrenal normal, imaging features of adenoma e.g., CT density <10 HU). If confirmed, proceed to step 2; otherwise, consider alternative first-line treatments.
STEP 2 — Rule In / Rule Out
Rule In: Unilateral benign adrenal lesion confirmed (suppressed ACTH, unilateral lesion with benign imaging features) -> proceed to step 3.
Rule Out: Not unilateral benign (bilateral disease, malignant features, or unconfirmed) -> do not apply this skill; consider other first-line options (e.g., TSS for ACTH-dependent CS, medical therapy or bilateral adrenalectomy for bilateral disease).
STEP 3 — Classify or Stratify
Confirm patient is a surgical candidate and that an experienced adrenal surgeon is available (e.g., surgeon with expertise in adrenal surgery, typically >20 adrenalectomies/year). If yes, proceed to step 4; else, consider alternatives (e.g., medical therapy or referral to experienced center).
STEP 4 — Decide
Recommend unilateral adrenalectomy by the experienced adrenal surgeon.
Clinical Guardrails / Mimics / Pitfalls
Do not proceed if malignancy is suspected (irregular margins, invasion, CT density >20 HU, or hormonal profile suggestive of carcinoma). Do not proceed if bilateral disease is suspected (e.g., in ACTH-independent CS, contralateral adrenal nodularity or biochemical evidence of bilateral autonomy). Pitfall: mistaking unilateral lesion in early BMAH as solitary adenoma — always image both adrenals and consider biochemical tests for bilateral autonomy. Ensure surgeon experience to avoid higher complication rates.
Concrete Clinical Example
A 50-year-old man with hypertension, diabetes, and easy bruising has elevated UFC (2x ULN), loss of diurnal cortisol rhythm, and suppressed ACTH. CT shows a 2.0 cm right adrenal lesion with homogeneous low density (3 HU), consistent with lipid-rich adenoma; left adrenal normal. -> Recommend unilateral right adrenalectomy by an experienced adrenal surgeon.
Source: Treatment of Cushing’s Syndrome: An Endocrine Society Clinical Practice Guideline, Endocrine Society, 2015, doi:10.1210/jc.2015-1818