This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Extra-adrenal pheochromocytoma secretes - \nSelect and explain. \nA. Norepinephrine, B. Epinephrine, C. Metanephrine, D. Dopamine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans is option 1.. Norepinephrine Catecholamines secreted by adrenal medulla - Normally - epinephrine 80% nor epinephrine 20% In adrenal pheochromacytoma- epinephrine is the main hormone secreted.. Norepinephrine also increased In extraadrenal pheochromocytoma - Norepinephrine exclusively In malignant pheochromocytoma - dopamine and homovanillmic acid increases Ref Harrison 17/e p 2270', 'role': 'assistant'}]