I am a 59 year-old male. I had my left kidney removed 4.5 years ago as a result of renal cancer. The cancer was discovered only after several visits to my internal medicine M.D., when I insisted on a CT scan. The tumor was very large, and very aggressive. Since then, I have had regular follow-up visits to a nephrologist. All tests have indicated that my remaining kidney is functioning normally. My nephrologist has told me that I now need to see him only once a year. However, I am concerned because I continue to have many of the same symptoms that preceded my original diagnosis. These are: bloating after meals, significant pitting edema in both legs, edema in both hands (especially fingers) and foamy bubbles in my urine each time I void. In addition, for the past year, I have had frequent episodes of what I believe is hypoglycemia (shaking, dizziness, slurred speech, loss of concentration). Do you believe that I need to seek a second opinion? Do you believe that my symptoms are of any immediate concern? Do you have any recommendations for tests I should have done? Other suggestions? Many thanks for your counsel.