I have been to doctors and hospitals, etc. for many months now. A simple fatty lump in the back turned into fluid in my pelvis (ascites) noticed on an MRI. No one can tell me what it is. My CA-125 test came back normal. I don't drink. My sonagram showed my ovary (after a hysterectomy) appears normal. I am tired and feel like I've got a fever a lot. Not old enough to be menopausal, and don't have 'sweats.' Two of the doctors told me that if I get a really bad fever to go to the ER right away. Other doctors want to do surgery to determine if it's ovarian cancer, colon cancer, or liver disease (although all looked normal in the MRI). Is there any way to determine this without surgery? I don't know exactly where to go from here. My thyroid tests are all normal. However, my urine is bright yellow. What could this be, and how can I find out?