CTICasesCystic tumor of the AV node and splenosis
Imaging findings
CT and cardiac MRI demonstrate a small, fluid-attenuating cystic lesion (cystic tumor of the AV node) at the junction of the left ventricle and right atrium, near the AV node. The abdominal CT also shows multiple enhancing peritoneal nodules, confirmed as splenosis via a liver-spleen scan.
Key takeaways
Cystic tumor of the AV node is a benign, congenital developmental cyst lined by embryologic rest cells. Despite its benign pathology, its location can cause heart block and sudden cardiac death.
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