CTICasesCommon Ostium of Pulmonary Veins
Imaging findings
Chest CT demonstrates anomalous insertion of both inferior pulmonary veins into a single common trunk/ostium at the posterior-inferior left atrium, mimicking cor triatriatum or anomalous venous return.
Key takeaways
A common pulmonary venous ostium (usually involving the left veins or all veins) is a benign congenital anatomical variant that must be distinguished from pathologically significant anomalies like cor triatriatum.
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