CTICasesMetastatic Breast Cancer Mimicking Primary Lung Cancer
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Imaging findings
A prior chest radiograph showed surgical sponges in the right breast following breast cancer surgery. Later, a subtle finding at the right lung base was initially interpreted as normal, but a new density was present in the infra-hilar or subcarinal space on lateral view. Subsequent CT five months later revealed bulky lymphadenopathy, narrowing of the right lower lobe bronchus, and a post-obstructive pneumonia. PET CT with contrast showed the tumor extending into the left atrium.
Key takeaways
This case presented with very subtle radiographic findings and symptoms initially suggestive of a primary lung cancer. However, it was confirmed to be metastatic breast cancer, several years after the patient was thought to be in remission. The metastatic tumor mimicked a primary lung cancer, including its growth into the left atrium.
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