This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Surgery
[{'content': 'Best way to localize extra-adrenal pheochromocytoma:- \nSelect and explain. \nA. X-ray, B. Nucleotide scan, C. VMA excretion, D. Clinical examination', 'role': 'user'}, {'content': 'Answer: B \nExplanation: IOC for extra adrenal pheochromocytoma is MRI>MIBG scan(aka-nucleotide scan) Imaging MRI is IOC for adrenal, extra adrenal pheochromocytoma and in pregnancy MRI is 95% sensitive and 100% specific for pheochromocytoma CT scan should be performed without contrast administration to avoid hypeensive crisis. MIBG scan is useful for extra-adrenal pheochromocytoma but IOC is MRI even for extra adrenal pheochromocytoma. Biopsy is contraindicated as it precipitates hypeensive crisis', 'role': 'assistant'}]