Lung cancer with superior vena caval invasion
Recent right upper lobectomy for adenocarcinoma of the lung. Now chest pain and shortness of breath.
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Very large mass in the right upper lobe at the site of previous excision invading the mediastinum, entering the SVC as tumor thrombus (arrow).
SVC obstruction is usually due to extrinsic compression by mediastinal tumor. It is rare for tumor to invade the wall to enter the lumen.