In rare cases, a tumor (myxoma) growing on the valve surface or in
the left atrium of the heart can cause a blockage of the mitral valve that is
mitral valve stenosis. Myxomas are tumors of
connective tissue. They can occur almost anywhere in the body and can become
quite large. When they occur, they can either block the valve opening or
restrict the movement of the valve and prevent it from opening
How this information was developed to help you make better health decisions.