CTICasesCongenital Right Atrial Diverticulum
Imaging findings
CT and cardiac MRI show a well-defined, saccular outpocketing arising from the free wall of the right atrium, which enhances in synchrony with the cardiac chambers and follows the blood pool signal on all sequences, consistent with a right atrial diverticulum.
Key takeaways
Congenital right atrial diverticulum is a rare anomaly characterized by localized protrusion of the atrial wall. While often asymptomatic and found incidentally, they can act as a substrate for thrombus formation, right heart volume overload, or atrial tachyarrhythmias, and must be differentiated from pericardial cysts or cardiac tumors.
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