An atrial myxoma is a noncancerous tumor in the upper left or right side of the heart. It most often grows on the wall that separates the two sides of the heart. This wall is called the atrial septum.
Cardiac tumor - myxoma; Heart tumor - myxoma
A myxoma is a primary heart (cardiac) tumor. This means that the tumor started within the heart. Most heart tumors start somewhere else.
Primary cardiac tumors such as myxomas are rare. About 75% of myxomas occur in the left atrium of the heart. They most often begin in the wall that divides the two upper chambers of the heart. They can occur in other intra-cardiac sites as well. Atrial myxomas are sometimes linked with valve obstruction stenosis and atrial fibrillation.
Myxomas are more common in women. About 1 in 10 myxomas are passed down through families (inherited). These tumors are called familial myxomas. They tend to occur in more than one part of the heart at a time, and often cause symptoms at a younger age.
Many myxomas will not cause symptoms. These are often discovered when an imaging study (echocardiogram, MRI, CT) is done for another reason.
Symptoms may occur at any time, but often they go along with a change in body position.
Symptoms of a myxoma may include:
The symptoms and signs of left atrial myxomas often mimic mitral stenosis (narrowing of the valve between the left atrium and the left ventricle). Right atrial myxomas rarely produce symptoms until they have grown to be quite large (5 inches wide, or 13 cm).
Other symptoms may include:
Surgery is needed to remove the tumor, especially if it is causing heart failure symptoms or an embolism.
Changqing Gao practices in Beijing, China. Gao is rated as an Elite expert by MediFind in the treatment of Atrial Myxoma. They are also highly rated in 8 other conditions, according to our data. Their top areas of expertise are Atrial Myxoma, Atrial Septal Defect (ASD), Heart Tumor, Coronary Artery Bypass Graft (CABG), and Heart Bypass Surgery.
Thomas Strecker practices in Marburg An Der Lahn, Germany. Strecker is rated as an Elite expert by MediFind in the treatment of Atrial Myxoma. He is also highly rated in 7 other conditions, according to our data. His top areas of expertise are Atrial Myxoma, Heart Tumor, Ebola Virus Disease, Heart Transplant, and Heart Bypass Surgery.
Xiaojun Xie practices in Chongqing, China. Xie is rated as an Elite expert by MediFind in the treatment of Atrial Myxoma. They are also highly rated in 5 other conditions, according to our data. Their top areas of expertise are Atrial Myxoma, Heart Tumor, Constrictive Pericarditis, and Mitral Stenosis.
Untreated, a myxoma can lead to an embolism (tumor cells or a clot that breaks off and travels in the bloodstream). This can lead to a blockage of blood flow. Pieces of the tumor can move to the brain, eye, or limbs.
If the tumor grows inside the heart, it can block blood flow, causing symptoms of obstruction.
Complications may include:
Published Date: May 08, 2022
Published By: Michael A. Chen, MD, PhD, Associate Professor of Medicine, Division of Cardiology, Harborview Medical Center, University of Washington Medical School, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
Lenihan DJ, Reardon MJ, Hundley WG. Tumors affecting the cardiovascular system. In: Libby P, Bonow RO, Mann DL, Tomaselli GF, Bhatt DL, Solomon SD, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 12th ed. Philadelphia, PA: Elsevier; 2022:chap 98.
Tazelaar HD, Maleszewski JJ. Tumors of the heart and pericardium. In: Fletcher CDM, ed. Diagnostic Histopathology of Tumors. 5th ed. Philadelphia, PA: Elsevier; 2021:chap 2.