Primary lung cancer with growth into the lumen of the pulmonary artery.

We describe a 68-year-old man with primary lung cancer, misdiagnosed as pulmonary thromboembolism, with growth into the lumen of the pulmonary artery (PA). The tumor was surgically unresectable because of difficulty with the bronchoplasty; however, it was progressing rapidly and obstructing the main PA. We urgently performed a partial resection of this tumor and occluded the left PA ostium with autologous pericardium to avoid spread into the main PA.