case_images: PMC10756152_01
case_images: Left atrial view showing the large mass in the right atrium extending into the coronary sinus.
case_images: mdcvj-19-1-1316-g1.jpg
case_images: PMC10756152_01_mdcvj-19-1-1316-g1.jpg
case_images: F1
case_images: Subsequently, the patient underwent cardiac magnetic resonance imaging to confirm the presence and extent of the mass (Figure 1; Video 1).
case_images: Axial plane cardiac magnetic resonance image demonstrating the extent of the intracardiac mass, which starts in the right atrium and extends into the coronary sinus. Incidentally, the patient has a large pericardial effusion without tamponade physiology. See also at https://youtu.be/y9w65OyMKNs.
case_images: .jpg
case_images: PMC10756152_01_.jpg
case_images: V1
case_images: A cardiac positron emission tomography study was performed in order to determine if the mass was a benign or malignant tumor (Figure 2).
case_images: (A) Axial plane image demonstrating intense fluorodeoxyglucose (FDG) uptake in the intracardiac mass (SUV Max 18). (B) Sagittal plane image demonstrating a second intracardiac mass in the wall of the right atrium, which also has intense FDG uptake (SUV Max 12). Intense FDG uptake in both masses is consistent with a malignant tumor. LV: left ventricle; RA: right atrium
case_images: mdcvj-19-1-1316-g2.jpg
case_images: PMC10756152_01_mdcvj-19-1-1316-g2.jpg
case_images: F2
case_images: The patient underwent an intracardiac echocardiography guided biopsy, which revealed diffuse B-cell lymphoma (Figure 3).