[A case of the old injured vena cava superior found during the operation of lung cancer].

We operated a 78-year-old male with lung cancer and unstable angina pectoris. During the operation of right upper lobe, a mass, with size of 2 cm in diameter was detected on the right postero-lateral side of the superior vena cava, and was resected. Postoperative pathological examination suggested that the mass resulted from an injury made by a Swan-Ganz catheter used before operation. Thus, as insertion of a Swan-Ganz catheter through the right subclavian vein may involve risk, so we concluded that the right internal jugular vein or femoral vein may be preferable as a route of first choice for insertion.