A method to prevent or treat cancer in a patient comprising: administering a first set of tumor cells; where at least some of the first tumor cells have at least one tumor antigen corresponding to antigen of the patient's tumor cells; where the tumor cells are contained in an implantable chamber; the...http://www.google.com.au/patents/US6156305?utm_source=gb-gplus-sharePatent US6156305 - Implanted tumor cells for the prevention and treatment of cancer