E-page Original Images: Lipomatous hypertrophy of the interatrial septum demonstrated by three-dimensional transesophageal echocardiography

Lipomatous hypertrophy of the interatrial septum (LHAS), characterized with lipid deposition in the interatrial septum, is thought to be benign and rarely associated with clinical manifestations. It is most often found incidentally in the elderly patients during echocardiography done for another reason. This tumor must be differentiated from other types of lesions including myxomas, true cardiac lipomas, liposarcomas, parietal thrombi, metastatic tumors and amyloidosis that appear as septal tumor mass.