Pregnancy-Specific PPGL Surgical Timing
STEP 1 — Gather Information
Confirm PPGL diagnosis via fractionated metanephrines (urine or plasma) and safe imaging (ultrasound or MRI). Document gestational age, tumor size/location, maternal hypertension/symptoms, and fetal status.
STEP 2 — Rule In / Rule Out
Assess if tumor resection is feasible before delivery: gestational age <24 weeks and tumor resectable. If yes, rule in for surgery; if gestational age ≥24 weeks or tumor unresectable, rule out immediate resection.
STEP 3 — Classify or Stratify
If feasible (<24 weeks), classify as candidate for second-trimester resection up to 24 weeks gestation. If not feasible (≥24 weeks), stratify to medical management until fetal viability.
STEP 4 — Decide
For feasible cases, proceed with laparoscopic tumor resection after adequate α-blockade (e.g., doxazosin) in the second trimester up to 24 weeks. For infeasible cases, initiate medical management (α-blockers ± calcium antagonists) and plan delivery/tumor removal after fetal viability.
Clinical Guardrails / Mimics / Pitfalls
Avoid CT and 123I-MIBG scintigraphy unless radiation benefits outweigh risks; do not use metyrosine due to limited safety data in pregnancy; avoid ARBs, ACE-Is, and direct renin inhibitors; never administer β-blockers before α-blockade; monitor for hypertensive crisis; consider cesarean section if tumor not resected pre-delivery.
Concrete Clinical Example
A 28‑year‑old at 18 weeks gestation presents with hypertension and palpitations; elevated urinary fractionated metanephrines; MRI shows 3 cm left adrenal tumor. After α‑blockade with doxazosin, laparoscopic adrenalectomy performed at 20 weeks; pregnancy continues uneventfully to term.
Source: Japan Endocrine Society Clinical Practice Guideline for the Diagnosis and Management of Pheochromocytoma and Paraganglioma 2025, Japan Endocrine Society, 2025, doi:10.1507/endocrj.EJ25-0165