Malignant and benign primary cardiac tumours are extremely rare, with an incidence in autopsy series reported to be 1 to 30 in 100,000. Myxoma is the most common cardiac tumour, and constitutes 50% of all benign cardiac tumours in adults. It is not as common in children and accounts for only 15% of such tumours. About 75% of primary cardiac tumours are benign. Most myxomas are found in the left atrium (75%) and in decreasing frequencies in the right atrium, right ventricle, and left ventricle. The incidence of myxomas peaks at 40 to 60 years of age. They are more common in women, with a female-to-male ratio of 3:1.
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