[Lung cancer which accompanies anomalous venous connections, pulmonary and systemic-partial anomalous pulmonary venous connection and persistent left superior vena cava: report of 2 cases].

We report the cases of a left partial anomalous pulmonary venous connection (PAPVC) and a persistent left superior vena cava (PLSVC), combined with primary lung cancer. Our case of PAPVC, the anomalous pulmonary vein originated from the hilum of the left upper lobe flowed into the left brachiocephalic vein. A left lower lobectomy was performed uneventfully without correcting the anomalous vein. And a case of PLSVC, the left superior vena cava flowed into the right superior vena cava, running under the aortic arch. A left upper lobectomy and mediastinal lymph node dissection was performed in safety. Although PLSVC was detected by chest computed tomography (CT) before operation, PAPVC was noticed intraoperatively in our case. We should keep in mind the possibility of variations of pulmonary vessel distribution, especially PAPVC located in a different lobe for resection, when undertaking lung resection.