I finished chemo in October 2010 and radiation in December following surgery for lt ovarian Ca. It had spread to the side wall which was excised but all other scans were clear. I started to develope lt flank pain during the fourth week of radiation which has gradually worsened. It is sore to palpate the lt flank area. Otherwise I am feeling well. What could this be. I am wondering if it is kidney damage from the chemo or radiation. I am 50 years old slim and fit. I have no fever or obvious blood in the urine. Pathology of my cancer showed it was a sarcoma and adenocarinoma mix.