Fat in Right Atrium LIPOMA OF THE SVC AND RAThis image of a coronally acquired T1 weighted MRI image of the heart shows a high intensity mass surrounding the SVC and the entrance right atrium (RA) with narrowing of the SVC. There were no symptoms of SVC syndrome in this patient with known COPD. Note that the mass has the intensity of subcutaneous fat. An atrial lipoma is the most likely diagnosis.Courtesy Jorge Medina38449cKEY WORDSCardiac, heart, vein, SVC , RA, mass, fat, lipoma, tumor, neoplasm, benign, imaging, radiology, MRI LIPOMA OF THE SVC AND RAThis series of axial T1 weighted MRI images of the heart show a high intensity mass surrounding the SVC (blue arrowhead) and the entrance to the right atrium (RA). There were no symptoms of SVC syndrome in this patient with known COPD. Note that the mass has the intensity of subcutaneous fat. An atrial lipoma is the most likely diagnosis.Courtesy Jorge Medina38449cKEY WORDSCardiac, heart, vein, SVC , RA, mass, fat, lipoma, tumor, neoplasm, benign, imaging, radiology, MRI