[A case of rupture of the right femoral artery pseudo aneurysm occurring in the site of a port for hepatic arterial infusion].

A 77-year-old man diagnosed with rectal cancer and multiple liver metastases underwent transverse colostomy in June 2008, and subsequently underwent radiotherapy of the whole pelvis; chemotherapy was started with 5-FU+l-LV and then switched to mFOLFOX6+bevacizumab. In February 2009, hepatic arterial infusion chemotherapy was carried out because of the exacerbation of appetite loss with chemotherapy and importance of the control of liver metastases. In March 2009, he had redness and swelling of the site of a port and was admitted to our hospital. The port was removed, but a CT scan showed a pseudo aneurysm with impending rupture in the right femoral artery necessitating emergency surgery. The right femoral artery was closed and a bypass between right external iliac artery and popliteal artery through the obturator foramen was constructed. This case is a rare complication, but rapid diagnosis and treatment are required when a pseudo aneurysm is suspected.