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