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': 'Thymoma can be associated with all, EXCEPT: \nSelect and explain. \nA. Superior mediastinum syndrome, B. Myasthenia gravis, C. Hypergammaglobulinemia, D. Pure red cell aplasia', 'role': 'user'}, {'content': "Answer: C \nExplanation: Answer is C (Hypergammaglobulinemia) : Thymoma is associated with Hypogammaglobulinemia and not Hypergammaglohulinemia Thymomas :are tumors of thymic epithelial cells found in adults and may be benign or malignant Presentation in Thvinomas Presentation due to mass effect Arise in Anterosuperior mediastinum and may present with manifestation of superior mediastinal syndrome. Presentation due to associated paraneoplastic syndrome Myaesthenia gravisQ Acquired HypogammaglobulinemiaQ Pure red cell aplasia Graves disease Perenicious anemia Dermatomyositis / polymyositis Cushing's syndrome", 'role': 'assistant'}]