Hi welcome to the health care magic Your all investigation report and detail history needed to reach up to diagnosis... Your collected fluid in abdomen can be tapped - paracentesis done and fluid sent for culture and cytological examination.... Work up also done with... -CBC with peripheral smear examination -CT scan if needed If PS, show atypical cell and diagnosis in doubt than bone marrow aspiration like investigation needed... According to cause treatment can be instituted Otherwise for edema diuretic and low salt is advisable... Serum protein level, cardiac causes and kidney problem also should be ruled out if suspected as they can lead edema Consult nearby physician for examination and accordingly further work up Take care