My father has been taking chemotherapy for cancer. He has cancer in his thyroid. Two weeks ago he was hospitalized for congestive heart failure. He is still in the hospital. Problem is he is retaining mass amounts of water. He has only one kidney. They have been restricting his water intake and administering lasiks to remove the water. But it isnt working. Any ideas as to what may be wrong?
Hello and welcome to Chat Doctor.  As a Urologist, I can understand your anxiety. Lasix is given to flush out excess fluids from the body. But if the kidney function is less, it cant be given, due to side effects. As you've not written the kidney function reports, its difficult to comment. If he's retaining fluids, he should get the following tests done