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Would this be 35663 or 35281 or 35286? "The tumor was identified and was circumferentially freed. The right external iliac artery was completely encased in the tumor and appeared to be invading the anterior wall of the external iliac vein. We attempted to develop a plane between the artery and the vein; however, the tumor was clearly invading the vein wall. A piece of cryopreserved superficial femoral artery was thawed. After 5 minutes of heparinization, the external iliac vein and artery were clamped proximal and distal to the tumor. The artery was transected 1 cm proximal and distal to the tumor. The anterior wall of the vein was then resected using a #15 blade. The specimen was passed off the table. The cryopreserved artery was inspected and flushed. A segment was cut to size to be used as an interposition graft for the right external iliac artery. End-to-end proximal and distal anastomoses were then created using a running 5-0 Prolene suture. Prior to tying the last suture the artery was backbled and forward flushed. Flow was restored to the RLE."