This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pathology
[{'content': 'Most common primary tumour of the heart: \nSelect and explain. \nA. Myxoma, B. Fibroma, C. Myoma, D. Angioma', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans: a (Myxoma) Ref: Robbins, 7th ed, p. 613; Harrison, 16th ed, p. 144The most common primary tumours of the heart, in the descending order of frequency are myxomas, fibromas, lipomas, papillary fibroelastomas, rhabdomyomas, angiosarcomas and other sarcomas.Myxomas* MC primary tumour of the heart* MC site: Fossa ovalis in atrial septum, left atria* Histological feature: Stellate or globular myxoma, (lepidic cells)* C/F: Most common presentation similar to that of mitral valve disease (i.e. MS or MR )* Constitutional symptoms: fever, malaise etc* O/E: tumour plop- low pitched* Rx. Surgical removal is curative.Myxoma associated syndromes* CARNEY syn:Multiple (cardiac & extracardiac) myxomas, spotty pigmentation, endocrine hyperactivity* LAMB syn:Lentigines. atrial myxoma, blue naevi* NAME syn:Nevi, atrial myxoma, myxoid neurofibroma, ephelidesBRIDGECarney's triad:- Paraganglioma Gastric leiomyosarcoma Pulmonary chondroma", 'role': 'assistant'}]