Radiation long term side effects

In 1997 I was diagnosed with breast cancer, had a lumpectomy with lymph node dissection along with CMF chemotherapy and ratiation.  I did not have lymph node involvement.  In 2000 I was again diagnosed with breast cancer, same breast, so I had bilateral mastectomies with reconstruction and AC chemotherapy.  In 2009 I was diagnosed with anal cancer and had chemotherapy and radiation treatment.  

Now I have just been diagnosed with a 4.1 cm aorta aneurysm.  I have none of the risk factors associated with an aneurysm such as high blood pressure, high cholesterol, have never smoked, and no one in my family has ever been diagnosed with an aorta aneurysm.  

Could this aneurysm be caused from the radiation I had with my breast cancer in 1997?

[Cleveland Clinic]

Dear tsuda:  If the aneurysm is in the radiation field, you might check with radiation oncologist to see, then it may be a possibility.  In general, though, one would not assume an aneurysm to be related.  Age is the most important risk factor.