Thank you for your reply! Ha! Ha!..the gift that keeps giving!!! I am thankful to radiation for saving my leg tho! The Vascular specialist said that the deep femoral artery is 75% blocked but there has been lateral 'feeders' on that system. He has put me on low dose aspirin and 20mg Lipitor...a walking test (different from plain walking ...where they measure how long it take for there to be pain)..another leg 'blood pressure' test in 6 months..as from the knee down, there are no blockages and nearly normal blood flow...only in the groin to 12 cm above the knee from the femerol origin...same area as the radiation. I see the doc in 6 months and if all remains the same then I will just continue to be monitored and not have surgery. I had contacted radiation oncology at Virginia Mason, Seattle (where I go and where my treatment was) as to any studies of long term affects of radiation and the blood vessels...have heard nothing! I will check out the site you recommended. Thanks.