A 67-year-old woman presented with a pulsatile mass on the right dorsum of the foot and was diagnosed with a dorsalis pedis artery aneurysm. We performed surgery and confirmed retrograde blood flow distal to the aneurysm intraoperatively. The aneurysm was excised with simple ligation of inflow and outflow vessels. Histopathology showed disruption of the internal elastic lamina and tunica media, consistent with a true aneurysm. True aneurysms of the dorsalis pedis artery are rare, and surgical strategy depends on intraoperative flow assessment and ischemic risk. Our case had a favorable outcome.

A 57-year-old woman was referred to our department following an abnormal finding on preoperative imaging for a duodenal submucosal tumor. Enhanced computed tomography revealed a 42 mm fusiform aneurysm of the left external iliac vein, without evidence of mural thrombus. Six months after the tumor resection, we performed elective aneurysmectomy and venous reconstruction utilizing a saphenous vein graft. Histopathological findings strongly suggested a primary venous aneurysm. The site of revascularization has remained patent for 1 year postoperatively. Primary iliac venous aneurysm is rare, but occasionally lethal without an appropriate treatment due to rupture or thromboembolism.