This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': "A 38 year old male has paroxysmal hypeension. He is subsequently found to have medullary carcinoma of the thyroid, pheochromocytoma, and mucosal neuromas. Parathyroid involvement is not noted. What is the most likely diagnosis? \nSelect and explain. \nA. MEN type I, B. MEN type II, C. MEN type III, D. Sipple's syndrome", 'role': 'user'}, {'content': "Answer: C \nExplanation: MEN III, also known as MEN IIb, is characterized by medullary thyroid carcinoma, pheochromocytoma, and mucosal neuromas.Wermer's syndrome is also called MEN type I . It is characterized by pancreatic (insulinoma), pituitary, and parathyroid involvement.Sipple's syndrome, or MEN type II , is similar to MEN III, but it has parathyroid involvement (tumor or adenoma) as opposed to neuromas. Ref: Wyatt C., Butterwoh IV J.F., Moos P.J., Mackey D.C., Brown T.G. (2008). Chapter 18. Endocrine Pathology. In C. Wyatt, J.F. Butterwoh IV, P.J. Moos, D.C. Mackey, T.G. Brown (Eds), Pathology: The Big Picture.", 'role': 'assistant'}]