Figure 10 Lipomatous hypertrophy of the atrial septum Figure 10 | Lipomatous hypertrophy of the atrial septum. a | Transthoracic echocardiogram (four-chamber view) showing lipomatous hypertrophy of the superior and inferior atrial septum (arrow), with the left atrium (LA) and left ventricle (LV) also in view. b | Subcostal view of the same patient showing the large size of the lesion (asterisk). c | Gross autopsy specimen showing prominent septal fat (asterisk). d | Cardiac CT demonstrating the dumbbell-shape (arrow) of the lesion; note the substantial pericardial fat that shares the same imaging characteristics as the atrial septum. RA, right atrium. Maleszewski, J. J. et al. (2017) Pathology, imaging, and treatment of cardiac tumours Nat. Rev. Cardiol. doi:10.1038/nrcardio.2017.47