CTICasesLeft Atrial Diverticulum / Accessory Left Atrial Appendage
Imaging findings
Chest computed tomography demonstrates a small, smooth, broad-based out-pouching arising from the anterosuperior wall of the left atrium.
Key takeaways
Left atrial diverticula and accessory left atrial appendages are benign, congenital anatomical variants. Diverticula typically have a broad base and smooth contours along the anterosuperior wall of the left atrium, whereas accessory appendages tend to have a narrow neck and irregular, lobulated contours; both are usually incidental findings of no clinical significance.
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