Re: Confused & Worried Daughter (long)
Fluid in the abdomen can be begnin or serious. It could be a sign of perotinitis, which is an infection or inflammation of the peritoneal cavity, the cavity that holds the digestive and reproductive organs. Or it could be just the naturally occuring fluids in the peritoneal cavity, which act as buffers for the organs. If anything was ruptured or perforated during or before the operation, the doctors would test that fluid to make sure that there is no infection or signs of cancer, especially, as you said in your story, if they could not get results from a biopsy of the lesions or tumors. Some tumors can burst and leak all of their "genetic information" into whatever cavity they are present in, causing infection or loss of a good biopsy. Best of luck to you!