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Extra-Adrenal Paraganglioma — RACP Adult Medicine MCQ

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HardEndocrinology & DiabetesExtra-Adrenal ParagangliomaRACP Adult Medicine

A 58-year-old man with suspected phaeochromocytoma has markedly elevated plasma metanephrines but CT abdomen shows no adrenal mass. What imaging is needed?

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Correct answer: A — 123I-MIBG scintigraphy or 68Ga-DOTATATE PET/CT

Functional imaging localises extra-adrenal paragangliomas. 68Ga-DOTATATE PET/CT has superior sensitivity (~95–100%).

Reference: eTG – 2025 – Endocrinology; Endocrine Society – 2014