The pulmonary artery (PA) may be infiltrated by primary lung tumors, lung metastasis, or lymph node metastasis infiltrating the vessel by extracapsular growth. The right and left PAs may be infiltrated to a various extent, ranging from partial infiltration to complete involvement of all vascular structures. Most often, the left central PA is involved because of its proximity to the left upper lobe bronchus. In the case of partial infiltration, a simple tangential resection and a direct suture might be sufficient. With larger defect reconstruction by applying a patch (autologous pericardium, bovine pericardium, azygos vein, or synthetic material), a sleeve resection or conduit implantation might be necessary.
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