This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Murmurs, Subject name: Medicine
Most common tumor of hea valves: 
Select and explain. 
A. Papillary fibroelastoma, B. Malignant fibrous histiocytoma, C. Angiosarcoma, D. Rhabdomyosarcoma
A: Papillary fibroelastoma
Answer: A: Papillary fibroelastoma 
Explanation: Most common tumor of hea valves in papillary fibroelastoma. Small and single, occur most often on valvular surfaces, and may be mobile, resulting in embolization. Because of the potential for embolic events, symptomatic patients, patients undergoing cardiac surgery for other lesions, and those with highly mobile and large PF should be considered for surgical excision Remnants of CMV have been recovered from these tumors, raising the possibility that they arise as a result of chronic viral endocarditis