Myxoma is commonest type of what are rare primary heart (cardiac) tumors; far more common are metastatic tumors seeded from elsewhere. The tumor is derived from multipotential mesenchymal cells and may cause a ball-valve obstruction. About 75% of myxomas occur in the left atrium of the heart, regularly beginning in the wall that divides the two upper chambers of the heart. The rest are in the right atrium. Right atrial myxomas are sometimes linked with tricuspid stenosis and atrial fibrillation
The tumor must be surgically removed. Some patients will also need their mitral valve replaced. This can be done during the same surgery. Myxomas may come back if operation did not remove all of the tumor cells.
An atrial myxoma is a non-cancerous tumor in the upper left or right side of the heart. It grows on the wall (atrial septum) that separates the two sides of the heart