case_images: PMC5353458_01
case_images: Panel a: ECG showing chaotic atrial arrhythmias with alternance of either sinus rhythm, premature atrial beats and atrial fibrillation. Panel b: Subcostal echo view showing the contact edge of the pulmonary mass (arrows) with the right atrium. Panel c: Apical 4-chamber view showing a large extracardiac mass next to the right atrium (RA). Panel d: Digital post-processing of MDCT scan (OsiriX Open Medical Software, Release 3.9.4t, Foundation OsiriX, Geneve, Switzerland) showing the mediastinal mass (arrows) infiltrating the pericardium, the right atrial wall and the inferior cava vein
case_images: JCE-25-29-g001.jpg
case_images: PMC5353458_01_JCE-25-29-g001.jpg
case_images: F1
case_images: Twelve-lead ECG showed chaotic atrial tachycardia [Figure 1a] with intermittent fibrillation, but no significant anomalies of the QRS complex and ST-T segment. Unexpectedly, a smoothed mass (approximately sized 8 x 8 cm) was disclosed next to (likely infiltrating) the free wall of the right atrium [Figure 1b and c]. A mediastinal mass was confirmed (measured 9.8 x 8.5 cm) to infiltrate the inferior cava vein and the right atrial wall [Figure 1d].