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: Medicine
[{'content': 'Atrial myxoma is associated with elevated serum levels of: \nSelect and explain. \nA. IL 1, B. IL 4, C. IL 6, D. None of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: Left atrial (LA) myxoma may obstruct LA emptying, causing dyspnea, a diastolic murmur, and hemodynamic changes resembling those of MS. However, patients with an LA myxoma often have features suggestive of a systemic disease, such as weight loss, fever, anemia, systemic emboli, and elevated serum IgG and interleukin 6 (IL-6) concentrations Ref: Harrison's principle of internal medicine 17th edition, chapter 230.", 'role': 'assistant'}]