surgical revascularization for treatment of chronic mesenteric ischemia secondary to radiotherapy Background: Chronic mesenteric ischemia is observed in older people and is often due to atherosclerosis. Radiotherapy is an important risk factor for atherosclerosis. aim: To report our experience with chronic mesenteric ischemia secondary to retroperitoneal radiotherapy. material and methods: Review of medical records of four male patients aged 39 to 65 years, treated for chronic mesenteric ischemia secondary to para-aortic radiotherapy between 1993 and 2011. results: All of them had the classic symptoms of ischemia characterized by post prandial abdominal pain and weight loss. One had also isolated diarrhea episodes. Revascularization was achieved with open or endovascular surgery, with good results during a follow up period ranging from two to 20 years. conclusions: Surgical revascularization is a good treatment for chronic mesenteric ischemia secondary to radiotherapy