Left atrial myxomas. A. More polypoid and irregular. B. Smooth surfaced and rounded. Attachment to and portion of the atrial septum is seen on each tumor. C. An asymptomatic sessile myxoma attached above the posterior leaflet of the mitral valve was found coincidentally at necropsy.
Hall, R.J., MD, Cooley, D.A., MD, MCAllister, Jr., H.A., MD, Frazier, O.H., MD, Neoplastic Heart Disease, Hurst's The Heart, 8th edition, p 2008.