Hi, my husband was diagnosed with renal medullary carcinoma in April 2009. When he was finally admitted into the hospital, he had huge amounts of fluid in his abdomen. The doctors told us that it was the cancer buildup. However, prior to his death, the doctors were removing anywhere between 2-4 liters of fluid from his abdomen a day (but it only replinished itself within hours of removal).
My husband's cancer was diagnosed the last week of April 09, and he passed away 2 weeks later. RCC and RMC are both renal cancers, but I believe they are very different...
I hope this helps...