It is possible that adding a second drug to the chemotherapy, called bevacizumab may make he fluid dry up even faster. It is not known whether adding bevacizumab to chemotherapy for patients with a Pleur-XTM catheter in place is more helpful, or potentially more harmful, than using chemotherapy alone. For this reason, only patients enrolled in this research protocol can receive both chemotherapy and bevacizumab while they have a Pleur-XTM catheter in place.