Esa Pa Treatment Unilateral

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name: esa-pa-treatment-unilateral
description: Determines whether to recommend unilateral laparoscopic adrenalectomy or medical therapy with a mineralocorticoid receptor antagonist for patients with confirmed unilateral PA (aldosterone-producing adenoma or unilateral adrenal hyperplasia). Triggered when discussing treatment options after confirming unilateral PA in a hypertensive patient with hypokalemia or resistant hypertension.
---

# Choose Between Surgery and Medical Treatment for Unilateral PA

## STEP 1 — Gather Information
Confirm unilateral PA via adrenal venous sampling (AVS) or, in patients <35 years with spontaneous hypokalemia, marked aldosterone excess (PAC >20 ng/dL), and a unilateral adrenal lesion on CT consistent with adenoma. Assess surgical fitness (ASA class, comorbidities, coagulopathy) and patient treatment preference.  
→ Proceed to assess surgical candidacy.

## STEP 2 — Rule In / Rule Out
Is the patient able and willing to undergo laparoscopic adrenalectomy?  
- Yes → Proceed to STEP 3.  
- No → Recommend medical therapy with a mineralocorticoid receptor antagonist (MRA) and end.

## STEP 3 — Classify or Stratify
For surgical candidates, determine if AVS can be omitted: age <35 years, spontaneous hypokalemia, marked aldosterone excess (PAC >20 ng/dL), and unilateral adrenal lesion on CT suggestive of adenoma.  
- All criteria met → Proceed to adrenalectomy without AVS.  
- Any criterion not met → Obtain AVS to confirm unilateral source.

## STEP 4 — Decide
If AVS shows a lateralization ratio >4:1 (with cosyntropin) or criteria from STEP 3 were met, recommend unilateral laparoscopic adrenalectomy.  
If AVS indicates bilateral disease, the patient declines surgery after counseling, or surgical contraindications exist, recommend medical therapy with an MRA (spironolactone preferred; eplerenone as alternative).

## Clinical Guardrails / Mimics / Pitfalls
Do not proceed to surgery without confirming unilateral source unless strict age/hypokalemia/CT criteria are met. Avoid surgery in patients with uncontrolled coagulopathy, severe cardiopulmonary disease, or pregnancy. Do not mistake non‑functioning incidentaloma for APA; AVS is required when CT is equivocal. Monitor for hyperkalemia, gynecomastia, and menstrual disturbances with MRA; counsel patients on side‑effects before initiation.

## Concrete Clinical Example
A 45‑year‑old woman with hypertension, spontaneous hypokalemia, ARR positive, AVS shows left‑right aldosterone/cortisol ratio 5:1, desires definitive treatment, has no surgical contraindications → undergoes laparoscopic left adrenalectomy.

**Source:** The Management of Primary Aldosteronism: Case Detection, Diagnosis, and Treatment: An Endocrine Society Clinical Practice Guideline, Endocrine Society, 2016, doi:10.1210/jc.2015-4061