My Husband Is 75 And Has Been Overweight For Many

My husband is 75 and has been overweight for many years. In the last five months he has lost about 30 pounds. From 255 + to 230. He also just learned that he has blood in his urine. He has had lung cancer ( stage 1, about 5 years ago) and prostrate cancer about 15 years ago (again stage 1). He had kidney stones twice, last year with surgery. We would like to know some possibilities for diagnosis. He will not be seeing a urologist for several weeks. Thank you.