Ascites is a debilitating and unpleasant complication of several types of cancer. Animal and laboratory studies have shown that tumor cell production and/or increases in the amount of Vascular Endothelial Growth Factor (VEGF) is a major cause of the formation of malignant ascites. Therefore, giving patients with malignant ascites a drug that targets and neutralizes VEGF should prevent the recurrence of malignant ascites following paracentesis (a procedure to remove fluid from the abdominal cavity).